Home / 13,613.97-20,424.61-12,312.71

Finding the Fourth Proportional to 13,613.97, 20,424.61 and 12,312.71

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Solution

The fourth proportional to 13,613.97, 20,424.61 and 12,312.71 is: 18,472.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,613.97 : 20,424.61 = 12,312.71 : x
  2. Step 2: Convert to fraction form
    13,613.97/20,424.61 = 12,312.71/x
  3. Step 3: Cross multiply
    13,613.97x = 20,424.61 × 12,312.71
  4. Step 4: Simplify right side
    13,613.97x = 251,482,220.39
  5. Step 5: Solve for x
    x = 251,482,220.39/13,613.97
  6. Step 6: Final answer
    x = 18,472.36

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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.