Home / 20,711.28-31,068.24-7,561.95

Finding the Fourth Proportional to 20,711.28, 31,068.24 and 7,561.95

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Solution

The fourth proportional to 20,711.28, 31,068.24 and 7,561.95 is: 11,343.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,711.28 : 31,068.24 = 7,561.95 : x
  2. Step 2: Convert to fraction form
    20,711.28/31,068.24 = 7,561.95/x
  3. Step 3: Cross multiply
    20,711.28x = 31,068.24 × 7,561.95
  4. Step 4: Simplify right side
    20,711.28x = 234,936,477.47
  5. Step 5: Solve for x
    x = 234,936,477.47/20,711.28
  6. Step 6: Final answer
    x = 11,343.41

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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.