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Finding the Fourth Proportional to 8,981.12, 12,352.82 and 7,208.84

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Solution

The fourth proportional to 8,981.12, 12,352.82 and 7,208.84 is: 9,915.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,981.12 : 12,352.82 = 7,208.84 : x
  2. Step 2: Convert to fraction form
    8,981.12/12,352.82 = 7,208.84/x
  3. Step 3: Cross multiply
    8,981.12x = 12,352.82 × 7,208.84
  4. Step 4: Simplify right side
    8,981.12x = 89,049,502.93
  5. Step 5: Solve for x
    x = 89,049,502.93/8,981.12
  6. Step 6: Final answer
    x = 9,915.19

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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.