Home / 12,901.38-19,385.28-12,540.12

Finding the Fourth Proportional to 12,901.38, 19,385.28 and 12,540.12

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Solution

The fourth proportional to 12,901.38, 19,385.28 and 12,540.12 is: 18,842.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,901.38 : 19,385.28 = 12,540.12 : x
  2. Step 2: Convert to fraction form
    12,901.38/19,385.28 = 12,540.12/x
  3. Step 3: Cross multiply
    12,901.38x = 19,385.28 × 12,540.12
  4. Step 4: Simplify right side
    12,901.38x = 243,093,737.43
  5. Step 5: Solve for x
    x = 243,093,737.43/12,901.38
  6. Step 6: Final answer
    x = 18,842.46

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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.