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Finding the Fourth Proportional to 8,977.65, 12,391.92 and 6,143.91

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Solution

The fourth proportional to 8,977.65, 12,391.92 and 6,143.91 is: 8,480.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,977.65 : 12,391.92 = 6,143.91 : x
  2. Step 2: Convert to fraction form
    8,977.65/12,391.92 = 6,143.91/x
  3. Step 3: Cross multiply
    8,977.65x = 12,391.92 × 6,143.91
  4. Step 4: Simplify right side
    8,977.65x = 76,134,841.21
  5. Step 5: Solve for x
    x = 76,134,841.21/8,977.65
  6. Step 6: Final answer
    x = 8,480.49

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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.