Home / 27,780.38-38,337.19-15,205.40

Finding the Fourth Proportional to 27,780.38, 38,337.19 and 15,205.40

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Solution

The fourth proportional to 27,780.38, 38,337.19 and 15,205.40 is: 20,983.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,780.38 : 38,337.19 = 15,205.40 : x
  2. Step 2: Convert to fraction form
    27,780.38/38,337.19 = 15,205.40/x
  3. Step 3: Cross multiply
    27,780.38x = 38,337.19 × 15,205.40
  4. Step 4: Simplify right side
    27,780.38x = 582,932,079.13
  5. Step 5: Solve for x
    x = 582,932,079.13/27,780.38
  6. Step 6: Final answer
    x = 20,983.59

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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.