Home / 18,418.42-25,397.28-12,439.71

Finding the Fourth Proportional to 18,418.42, 25,397.28 and 12,439.71

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Solution

The fourth proportional to 18,418.42, 25,397.28 and 12,439.71 is: 17,153.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,418.42 : 25,397.28 = 12,439.71 : x
  2. Step 2: Convert to fraction form
    18,418.42/25,397.28 = 12,439.71/x
  3. Step 3: Cross multiply
    18,418.42x = 25,397.28 × 12,439.71
  4. Step 4: Simplify right side
    18,418.42x = 315,934,797.99
  5. Step 5: Solve for x
    x = 315,934,797.99/18,418.42
  6. Step 6: Final answer
    x = 17,153.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.