Home / 22,555.88-31,127.11-13,130.72

Finding the Fourth Proportional to 22,555.88, 31,127.11 and 13,130.72

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Solution

The fourth proportional to 22,555.88, 31,127.11 and 13,130.72 is: 18,120.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,555.88 : 31,127.11 = 13,130.72 : x
  2. Step 2: Convert to fraction form
    22,555.88/31,127.11 = 13,130.72/x
  3. Step 3: Cross multiply
    22,555.88x = 31,127.11 × 13,130.72
  4. Step 4: Simplify right side
    22,555.88x = 408,721,177.36
  5. Step 5: Solve for x
    x = 408,721,177.36/22,555.88
  6. Step 6: Final answer
    x = 18,120.39

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Half scale
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Double scale
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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.