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Finding the Fourth Proportional to 8,712.11, 12,017.33 and 7,649.05

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Solution

The fourth proportional to 8,712.11, 12,017.33 and 7,649.05 is: 10,550.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,712.11 : 12,017.33 = 7,649.05 : x
  2. Step 2: Convert to fraction form
    8,712.11/12,017.33 = 7,649.05/x
  3. Step 3: Cross multiply
    8,712.11x = 12,017.33 × 7,649.05
  4. Step 4: Simplify right side
    8,712.11x = 91,921,119.79
  5. Step 5: Solve for x
    x = 91,921,119.79/8,712.11
  6. Step 6: Final answer
    x = 10,550.97

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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.