Home / 27,781.09-38,335.49-15,680.91

Finding the Fourth Proportional to 27,781.09, 38,335.49 and 15,680.91

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Solution

The fourth proportional to 27,781.09, 38,335.49 and 15,680.91 is: 21,638.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,781.09 : 38,335.49 = 15,680.91 : x
  2. Step 2: Convert to fraction form
    27,781.09/38,335.49 = 15,680.91/x
  3. Step 3: Cross multiply
    27,781.09x = 38,335.49 × 15,680.91
  4. Step 4: Simplify right side
    27,781.09x = 601,135,098.41
  5. Step 5: Solve for x
    x = 601,135,098.41/27,781.09
  6. Step 6: Final answer
    x = 21,638.28

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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.