Home / 20,517.32-30,840.21-13,542.17

Finding the Fourth Proportional to 20,517.32, 30,840.21 and 13,542.17

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Solution

The fourth proportional to 20,517.32, 30,840.21 and 13,542.17 is: 20,355.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,517.32 : 30,840.21 = 13,542.17 : x
  2. Step 2: Convert to fraction form
    20,517.32/30,840.21 = 13,542.17/x
  3. Step 3: Cross multiply
    20,517.32x = 30,840.21 × 13,542.17
  4. Step 4: Simplify right side
    20,517.32x = 417,643,212.45
  5. Step 5: Solve for x
    x = 417,643,212.45/20,517.32
  6. Step 6: Final answer
    x = 20,355.65

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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.