Home / 28,129.60-38,818.08-15,553.92

Finding the Fourth Proportional to 28,129.60, 38,818.08 and 15,553.92

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Solution

The fourth proportional to 28,129.60, 38,818.08 and 15,553.92 is: 21,463.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,129.60 : 38,818.08 = 15,553.92 : x
  2. Step 2: Convert to fraction form
    28,129.60/38,818.08 = 15,553.92/x
  3. Step 3: Cross multiply
    28,129.60x = 38,818.08 × 15,553.92
  4. Step 4: Simplify right side
    28,129.60x = 603,773,310.87
  5. Step 5: Solve for x
    x = 603,773,310.87/28,129.60
  6. Step 6: Final answer
    x = 21,463.98

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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.