Home / 10,115.08-13,959.05-5,638.71

Finding the Fourth Proportional to 10,115.08, 13,959.05 and 5,638.71

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Solution

The fourth proportional to 10,115.08, 13,959.05 and 5,638.71 is: 7,781.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,115.08 : 13,959.05 = 5,638.71 : x
  2. Step 2: Convert to fraction form
    10,115.08/13,959.05 = 5,638.71/x
  3. Step 3: Cross multiply
    10,115.08x = 13,959.05 × 5,638.71
  4. Step 4: Simplify right side
    10,115.08x = 78,711,058.98
  5. Step 5: Solve for x
    x = 78,711,058.98/10,115.08
  6. Step 6: Final answer
    x = 7,781.56

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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.