Home / 22,557.60-31,125.36-13,129.20

Finding the Fourth Proportional to 22,557.60, 31,125.36 and 13,129.20

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Solution

The fourth proportional to 22,557.60, 31,125.36 and 13,129.20 is: 18,115.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,557.60 : 31,125.36 = 13,129.20 : x
  2. Step 2: Convert to fraction form
    22,557.60/31,125.36 = 13,129.20/x
  3. Step 3: Cross multiply
    22,557.60x = 31,125.36 × 13,129.20
  4. Step 4: Simplify right side
    22,557.60x = 408,651,076.51
  5. Step 5: Solve for x
    x = 408,651,076.51/22,557.60
  6. Step 6: Final answer
    x = 18,115.89

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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.