Home / 27,640.76-38,143.08-15,702.75

Finding the Fourth Proportional to 27,640.76, 38,143.08 and 15,702.75

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Solution

The fourth proportional to 27,640.76, 38,143.08 and 15,702.75 is: 21,669.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,640.76 : 38,143.08 = 15,702.75 : x
  2. Step 2: Convert to fraction form
    27,640.76/38,143.08 = 15,702.75/x
  3. Step 3: Cross multiply
    27,640.76x = 38,143.08 × 15,702.75
  4. Step 4: Simplify right side
    27,640.76x = 598,951,249.47
  5. Step 5: Solve for x
    x = 598,951,249.47/27,640.76
  6. Step 6: Final answer
    x = 21,669.13

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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.