Home / 20,761.09-31,141.60-7,614.52

Finding the Fourth Proportional to 20,761.09, 31,141.60 and 7,614.52

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Solution

The fourth proportional to 20,761.09, 31,141.60 and 7,614.52 is: 11,421.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,761.09 : 31,141.60 = 7,614.52 : x
  2. Step 2: Convert to fraction form
    20,761.09/31,141.60 = 7,614.52/x
  3. Step 3: Cross multiply
    20,761.09x = 31,141.60 × 7,614.52
  4. Step 4: Simplify right side
    20,761.09x = 237,128,336.03
  5. Step 5: Solve for x
    x = 237,128,336.03/20,761.09
  6. Step 6: Final answer
    x = 11,421.77

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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.