Home / 20,331.72-30,508.02-15,399.72

Finding the Fourth Proportional to 20,331.72, 30,508.02 and 15,399.72

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Solution

The fourth proportional to 20,331.72, 30,508.02 and 15,399.72 is: 23,107.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,331.72 : 30,508.02 = 15,399.72 : x
  2. Step 2: Convert to fraction form
    20,331.72/30,508.02 = 15,399.72/x
  3. Step 3: Cross multiply
    20,331.72x = 30,508.02 × 15,399.72
  4. Step 4: Simplify right side
    20,331.72x = 469,814,965.75
  5. Step 5: Solve for x
    x = 469,814,965.75/20,331.72
  6. Step 6: Final answer
    x = 23,107.49

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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.