Home / 10,930.74-15,058.08-8,691.90

Finding the Fourth Proportional to 10,930.74, 15,058.08 and 8,691.90

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Solution

The fourth proportional to 10,930.74, 15,058.08 and 8,691.90 is: 11,973.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,930.74 : 15,058.08 = 8,691.90 : x
  2. Step 2: Convert to fraction form
    10,930.74/15,058.08 = 8,691.90/x
  3. Step 3: Cross multiply
    10,930.74x = 15,058.08 × 8,691.90
  4. Step 4: Simplify right side
    10,930.74x = 130,883,325.55
  5. Step 5: Solve for x
    x = 130,883,325.55/10,930.74
  6. Step 6: Final answer
    x = 11,973.88

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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.