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Finding the Fourth Proportional to 28,230.56, 38,958.91 and 15,484.30

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Solution

The fourth proportional to 28,230.56, 38,958.91 and 15,484.30 is: 21,368.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,230.56 : 38,958.91 = 15,484.30 : x
  2. Step 2: Convert to fraction form
    28,230.56/38,958.91 = 15,484.30/x
  3. Step 3: Cross multiply
    28,230.56x = 38,958.91 × 15,484.30
  4. Step 4: Simplify right side
    28,230.56x = 603,251,314.00
  5. Step 5: Solve for x
    x = 603,251,314.00/28,230.56
  6. Step 6: Final answer
    x = 21,368.73

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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.