Home / 20,664.47-31,000.19-8,177.91

Finding the Fourth Proportional to 20,664.47, 31,000.19 and 8,177.91

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Solution

The fourth proportional to 20,664.47, 31,000.19 and 8,177.91 is: 12,268.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,664.47 : 31,000.19 = 8,177.91 : x
  2. Step 2: Convert to fraction form
    20,664.47/31,000.19 = 8,177.91/x
  3. Step 3: Cross multiply
    20,664.47x = 31,000.19 × 8,177.91
  4. Step 4: Simplify right side
    20,664.47x = 253,516,763.80
  5. Step 5: Solve for x
    x = 253,516,763.80/20,664.47
  6. Step 6: Final answer
    x = 12,268.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.