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Finding the Fourth Proportional to 8,218.78, 12,331.27 and 4,934.16

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Solution

The fourth proportional to 8,218.78, 12,331.27 and 4,934.16 is: 7,403.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,218.78 : 12,331.27 = 4,934.16 : x
  2. Step 2: Convert to fraction form
    8,218.78/12,331.27 = 4,934.16/x
  3. Step 3: Cross multiply
    8,218.78x = 12,331.27 × 4,934.16
  4. Step 4: Simplify right side
    8,218.78x = 60,844,459.18
  5. Step 5: Solve for x
    x = 60,844,459.18/8,218.78
  6. Step 6: Final answer
    x = 7,403.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.