Home / 20,740.92-31,111.38-5,158.55

Finding the Fourth Proportional to 20,740.92, 31,111.38 and 5,158.55

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Solution

The fourth proportional to 20,740.92, 31,111.38 and 5,158.55 is: 7,737.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,740.92 : 31,111.38 = 5,158.55 : x
  2. Step 2: Convert to fraction form
    20,740.92/31,111.38 = 5,158.55/x
  3. Step 3: Cross multiply
    20,740.92x = 31,111.38 × 5,158.55
  4. Step 4: Simplify right side
    20,740.92x = 160,489,427.95
  5. Step 5: Solve for x
    x = 160,489,427.95/20,740.92
  6. Step 6: Final answer
    x = 7,737.82

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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.