Home / 20,761.19-31,140.50-6,720.91

Finding the Fourth Proportional to 20,761.19, 31,140.50 and 6,720.91

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Solution

The fourth proportional to 20,761.19, 31,140.50 and 6,720.91 is: 10,080.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,761.19 : 31,140.50 = 6,720.91 : x
  2. Step 2: Convert to fraction form
    20,761.19/31,140.50 = 6,720.91/x
  3. Step 3: Cross multiply
    20,761.19x = 31,140.50 × 6,720.91
  4. Step 4: Simplify right side
    20,761.19x = 209,292,497.86
  5. Step 5: Solve for x
    x = 209,292,497.86/20,761.19
  6. Step 6: Final answer
    x = 10,080.95

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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.