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Finding the Fourth Proportional to 8,811.15, 12,151.15 and 7,024.56

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Solution

The fourth proportional to 8,811.15, 12,151.15 and 7,024.56 is: 9,687.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,811.15 : 12,151.15 = 7,024.56 : x
  2. Step 2: Convert to fraction form
    8,811.15/12,151.15 = 7,024.56/x
  3. Step 3: Cross multiply
    8,811.15x = 12,151.15 × 7,024.56
  4. Step 4: Simplify right side
    8,811.15x = 85,356,419.12
  5. Step 5: Solve for x
    x = 85,356,419.12/8,811.15
  6. Step 6: Final answer
    x = 9,687.32

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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.