Home / 12,381.92-18,551.31-10,315.20

Finding the Fourth Proportional to 12,381.92, 18,551.31 and 10,315.20

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Solution

The fourth proportional to 12,381.92, 18,551.31 and 10,315.20 is: 15,454.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,381.92 : 18,551.31 = 10,315.20 : x
  2. Step 2: Convert to fraction form
    12,381.92/18,551.31 = 10,315.20/x
  3. Step 3: Cross multiply
    12,381.92x = 18,551.31 × 10,315.20
  4. Step 4: Simplify right side
    12,381.92x = 191,360,472.91
  5. Step 5: Solve for x
    x = 191,360,472.91/12,381.92
  6. Step 6: Final answer
    x = 15,454.83

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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.