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Finding the Fourth Proportional to 7,182.84, 9,916.11 and 5,418.66

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Solution

The fourth proportional to 7,182.84, 9,916.11 and 5,418.66 is: 7,480.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,182.84 : 9,916.11 = 5,418.66 : x
  2. Step 2: Convert to fraction form
    7,182.84/9,916.11 = 5,418.66/x
  3. Step 3: Cross multiply
    7,182.84x = 9,916.11 × 5,418.66
  4. Step 4: Simplify right side
    7,182.84x = 53,732,028.61
  5. Step 5: Solve for x
    x = 53,732,028.61/7,182.84
  6. Step 6: Final answer
    x = 7,480.61

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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.