Home / 31,132.11-42,949.22-21,706.14

Finding the Fourth Proportional to 31,132.11, 42,949.22 and 21,706.14

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Solution

The fourth proportional to 31,132.11, 42,949.22 and 21,706.14 is: 29,945.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,132.11 : 42,949.22 = 21,706.14 : x
  2. Step 2: Convert to fraction form
    31,132.11/42,949.22 = 21,706.14/x
  3. Step 3: Cross multiply
    31,132.11x = 42,949.22 × 21,706.14
  4. Step 4: Simplify right side
    31,132.11x = 932,261,782.21
  5. Step 5: Solve for x
    x = 932,261,782.21/31,132.11
  6. Step 6: Final answer
    x = 29,945.35

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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.