Home / 8,915.43-12,306.39-5,140.11

Finding the Fourth Proportional to 8,915.43, 12,306.39 and 5,140.11

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Solution

The fourth proportional to 8,915.43, 12,306.39 and 5,140.11 is: 7,095.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,915.43 : 12,306.39 = 5,140.11 : x
  2. Step 2: Convert to fraction form
    8,915.43/12,306.39 = 5,140.11/x
  3. Step 3: Cross multiply
    8,915.43x = 12,306.39 × 5,140.11
  4. Step 4: Simplify right side
    8,915.43x = 63,256,198.30
  5. Step 5: Solve for x
    x = 63,256,198.30/8,915.43
  6. Step 6: Final answer
    x = 7,095.14

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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.