Home / 12,491.52-18,720-10,632.96

Finding the Fourth Proportional to 12,491.52, 18,720 and 10,632.96

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Solution

The fourth proportional to 12,491.52, 18,720 and 10,632.96 is: 15,934.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,491.52 : 18,720 = 10,632.96 : x
  2. Step 2: Convert to fraction form
    12,491.52/18,720 = 10,632.96/x
  3. Step 3: Cross multiply
    12,491.52x = 18,720 × 10,632.96
  4. Step 4: Simplify right side
    12,491.52x = 199,049,011.20
  5. Step 5: Solve for x
    x = 199,049,011.20/12,491.52
  6. Step 6: Final answer
    x = 15,934.73

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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.