Home / 12,613.45-17,391.14-7,889.53

Finding the Fourth Proportional to 12,613.45, 17,391.14 and 7,889.53

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Solution

The fourth proportional to 12,613.45, 17,391.14 and 7,889.53 is: 10,877.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,613.45 : 17,391.14 = 7,889.53 : x
  2. Step 2: Convert to fraction form
    12,613.45/17,391.14 = 7,889.53/x
  3. Step 3: Cross multiply
    12,613.45x = 17,391.14 × 7,889.53
  4. Step 4: Simplify right side
    12,613.45x = 137,207,920.76
  5. Step 5: Solve for x
    x = 137,207,920.76/12,613.45
  6. Step 6: Final answer
    x = 10,877.91

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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.