Home / 20,712.11-31,068.16-5,129.73

Finding the Fourth Proportional to 20,712.11, 31,068.16 and 5,129.73

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Solution

The fourth proportional to 20,712.11, 31,068.16 and 5,129.73 is: 7,694.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,712.11 : 31,068.16 = 5,129.73 : x
  2. Step 2: Convert to fraction form
    20,712.11/31,068.16 = 5,129.73/x
  3. Step 3: Cross multiply
    20,712.11x = 31,068.16 × 5,129.73
  4. Step 4: Simplify right side
    20,712.11x = 159,371,259.57
  5. Step 5: Solve for x
    x = 159,371,259.57/20,712.11
  6. Step 6: Final answer
    x = 7,694.60

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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.