Home / 8,921.48-12,310.79-5,143.91

Finding the Fourth Proportional to 8,921.48, 12,310.79 and 5,143.91

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Solution

The fourth proportional to 8,921.48, 12,310.79 and 5,143.91 is: 7,098.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,921.48 : 12,310.79 = 5,143.91 : x
  2. Step 2: Convert to fraction form
    8,921.48/12,310.79 = 5,143.91/x
  3. Step 3: Cross multiply
    8,921.48x = 12,310.79 × 5,143.91
  4. Step 4: Simplify right side
    8,921.48x = 63,325,508.52
  5. Step 5: Solve for x
    x = 63,325,508.52/8,921.48
  6. Step 6: Final answer
    x = 7,098.10

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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.