Home / 20,318.01-28,041.17-11,367.78

Finding the Fourth Proportional to 20,318.01, 28,041.17 and 11,367.78

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Solution

The fourth proportional to 20,318.01, 28,041.17 and 11,367.78 is: 15,688.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,318.01 : 28,041.17 = 11,367.78 : x
  2. Step 2: Convert to fraction form
    20,318.01/28,041.17 = 11,367.78/x
  3. Step 3: Cross multiply
    20,318.01x = 28,041.17 × 11,367.78
  4. Step 4: Simplify right side
    20,318.01x = 318,765,851.50
  5. Step 5: Solve for x
    x = 318,765,851.50/20,318.01
  6. Step 6: Final answer
    x = 15,688.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.