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Finding the Fourth Proportional to 18,238.76, 25,169.52 and 9,855.28

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Solution

The fourth proportional to 18,238.76, 25,169.52 and 9,855.28 is: 13,600.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,238.76 : 25,169.52 = 9,855.28 : x
  2. Step 2: Convert to fraction form
    18,238.76/25,169.52 = 9,855.28/x
  3. Step 3: Cross multiply
    18,238.76x = 25,169.52 × 9,855.28
  4. Step 4: Simplify right side
    18,238.76x = 248,052,667.07
  5. Step 5: Solve for x
    x = 248,052,667.07/18,238.76
  6. Step 6: Final answer
    x = 13,600.30

Related Problems

Find fourth proportional to 9,119.38, 12,584.76 and 4,927.64
Half scale
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Double scale
Find fourth proportional to 18,239.76, 25,170.90 and 9,856.28
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.