Home / 20,400.11-30,540.75-15,158.36

Finding the Fourth Proportional to 20,400.11, 30,540.75 and 15,158.36

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Solution

The fourth proportional to 20,400.11, 30,540.75 and 15,158.36 is: 22,693.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,400.11 : 30,540.75 = 15,158.36 : x
  2. Step 2: Convert to fraction form
    20,400.11/30,540.75 = 15,158.36/x
  3. Step 3: Cross multiply
    20,400.11x = 30,540.75 × 15,158.36
  4. Step 4: Simplify right side
    20,400.11x = 462,947,702.68
  5. Step 5: Solve for x
    x = 462,947,702.68/20,400.11
  6. Step 6: Final answer
    x = 22,693.39

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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.