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Finding the Fourth Proportional to 8,980.11, 12,391.11 and 5,001.21

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Solution

The fourth proportional to 8,980.11, 12,391.11 and 5,001.21 is: 6,900.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,980.11 : 12,391.11 = 5,001.21 : x
  2. Step 2: Convert to fraction form
    8,980.11/12,391.11 = 5,001.21/x
  3. Step 3: Cross multiply
    8,980.11x = 12,391.11 × 5,001.21
  4. Step 4: Simplify right side
    8,980.11x = 61,970,543.24
  5. Step 5: Solve for x
    x = 61,970,543.24/8,980.11
  6. Step 6: Final answer
    x = 6,900.87

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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.