Home / 20,761.20-31,140.92-9,664.06

Finding the Fourth Proportional to 20,761.20, 31,140.92 and 9,664.06

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Solution

The fourth proportional to 20,761.20, 31,140.92 and 9,664.06 is: 14,495.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,761.20 : 31,140.92 = 9,664.06 : x
  2. Step 2: Convert to fraction form
    20,761.20/31,140.92 = 9,664.06/x
  3. Step 3: Cross multiply
    20,761.20x = 31,140.92 × 9,664.06
  4. Step 4: Simplify right side
    20,761.20x = 300,947,719.34
  5. Step 5: Solve for x
    x = 300,947,719.34/20,761.20
  6. Step 6: Final answer
    x = 14,495.68

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1.5x scale

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.