Home / 30,142.52-45,233.84-12,387.74

Finding the Fourth Proportional to 30,142.52, 45,233.84 and 12,387.74

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Solution

The fourth proportional to 30,142.52, 45,233.84 and 12,387.74 is: 18,589.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,142.52 : 45,233.84 = 12,387.74 : x
  2. Step 2: Convert to fraction form
    30,142.52/45,233.84 = 12,387.74/x
  3. Step 3: Cross multiply
    30,142.52x = 45,233.84 × 12,387.74
  4. Step 4: Simplify right side
    30,142.52x = 560,345,049.12
  5. Step 5: Solve for x
    x = 560,345,049.12/30,142.52
  6. Step 6: Final answer
    x = 18,589.85

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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.