Home / 8,138.78-11,227.20-5,487.04

Finding the Fourth Proportional to 8,138.78, 11,227.20 and 5,487.04

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Solution

The fourth proportional to 8,138.78, 11,227.20 and 5,487.04 is: 7,569.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,138.78 : 11,227.20 = 5,487.04 : x
  2. Step 2: Convert to fraction form
    8,138.78/11,227.20 = 5,487.04/x
  3. Step 3: Cross multiply
    8,138.78x = 11,227.20 × 5,487.04
  4. Step 4: Simplify right side
    8,138.78x = 61,604,095.49
  5. Step 5: Solve for x
    x = 61,604,095.49/8,138.78
  6. Step 6: Final answer
    x = 7,569.21

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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.