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Finding the Fourth Proportional to 8,998.07, 12,408.89 and 7,114.14

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Solution

The fourth proportional to 8,998.07, 12,408.89 and 7,114.14 is: 9,810.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,998.07 : 12,408.89 = 7,114.14 : x
  2. Step 2: Convert to fraction form
    8,998.07/12,408.89 = 7,114.14/x
  3. Step 3: Cross multiply
    8,998.07x = 12,408.89 × 7,114.14
  4. Step 4: Simplify right side
    8,998.07x = 88,278,545.13
  5. Step 5: Solve for x
    x = 88,278,545.13/8,998.07
  6. Step 6: Final answer
    x = 9,810.84

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Half scale
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Double scale
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Similar ratio
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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.