Home / 27,930.12-38,542.58-15,354.78

Finding the Fourth Proportional to 27,930.12, 38,542.58 and 15,354.78

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Solution

The fourth proportional to 27,930.12, 38,542.58 and 15,354.78 is: 21,189.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,930.12 : 38,542.58 = 15,354.78 : x
  2. Step 2: Convert to fraction form
    27,930.12/38,542.58 = 15,354.78/x
  3. Step 3: Cross multiply
    27,930.12x = 38,542.58 × 15,354.78
  4. Step 4: Simplify right side
    27,930.12x = 591,812,836.53
  5. Step 5: Solve for x
    x = 591,812,836.53/27,930.12
  6. Step 6: Final answer
    x = 21,189.05

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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.