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Finding the Fourth Proportional to 18,305.64, 25,261.61 and 10,239.19

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Solution

The fourth proportional to 18,305.64, 25,261.61 and 10,239.19 is: 14,129.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,305.64 : 25,261.61 = 10,239.19 : x
  2. Step 2: Convert to fraction form
    18,305.64/25,261.61 = 10,239.19/x
  3. Step 3: Cross multiply
    18,305.64x = 25,261.61 × 10,239.19
  4. Step 4: Simplify right side
    18,305.64x = 258,658,424.50
  5. Step 5: Solve for x
    x = 258,658,424.50/18,305.64
  6. Step 6: Final answer
    x = 14,129.99

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Half scale
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Double scale
Find fourth proportional to 18,306.64, 25,262.99 and 10,240.19
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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.