Home / 20,400.43-30,541.20-15,158.68

Finding the Fourth Proportional to 20,400.43, 30,541.20 and 15,158.68

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Solution

The fourth proportional to 20,400.43, 30,541.20 and 15,158.68 is: 22,693.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,400.43 : 30,541.20 = 15,158.68 : x
  2. Step 2: Convert to fraction form
    20,400.43/30,541.20 = 15,158.68/x
  3. Step 3: Cross multiply
    20,400.43x = 30,541.20 × 15,158.68
  4. Step 4: Simplify right side
    20,400.43x = 462,964,277.62
  5. Step 5: Solve for x
    x = 462,964,277.62/20,400.43
  6. Step 6: Final answer
    x = 22,693.85

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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.