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Finding the Fourth Proportional to 8,921.80, 11,874.13 and 8,921.80

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Solution

The fourth proportional to 8,921.80, 11,874.13 and 8,921.80 is: 11,874.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,921.80 : 11,874.13 = 8,921.80 : x
  2. Step 2: Convert to fraction form
    8,921.80/11,874.13 = 8,921.80/x
  3. Step 3: Cross multiply
    8,921.80x = 11,874.13 × 8,921.80
  4. Step 4: Simplify right side
    8,921.80x = 105,938,613.03
  5. Step 5: Solve for x
    x = 105,938,613.03/8,921.80
  6. Step 6: Final answer
    x = 11,874.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.