Home / 28,354.08-39,127.68-15,778.56

Finding the Fourth Proportional to 28,354.08, 39,127.68 and 15,778.56

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Solution

The fourth proportional to 28,354.08, 39,127.68 and 15,778.56 is: 21,773.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,354.08 : 39,127.68 = 15,778.56 : x
  2. Step 2: Convert to fraction form
    28,354.08/39,127.68 = 15,778.56/x
  3. Step 3: Cross multiply
    28,354.08x = 39,127.68 × 15,778.56
  4. Step 4: Simplify right side
    28,354.08x = 617,378,446.54
  5. Step 5: Solve for x
    x = 617,378,446.54/28,354.08
  6. Step 6: Final answer
    x = 21,773.88

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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.