Home / 42,120.17-63,189.36-12,540.39

Finding the Fourth Proportional to 42,120.17, 63,189.36 and 12,540.39

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Solution

The fourth proportional to 42,120.17, 63,189.36 and 12,540.39 is: 18,813.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,120.17 : 63,189.36 = 12,540.39 : x
  2. Step 2: Convert to fraction form
    42,120.17/63,189.36 = 12,540.39/x
  3. Step 3: Cross multiply
    42,120.17x = 63,189.36 × 12,540.39
  4. Step 4: Simplify right side
    42,120.17x = 792,419,218.25
  5. Step 5: Solve for x
    x = 792,419,218.25/42,120.17
  6. Step 6: Final answer
    x = 18,813.30

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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.