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Finding the Fourth Proportional to 9,378.97, 12,916.71 and 9,174.85

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Solution

The fourth proportional to 9,378.97, 12,916.71 and 9,174.85 is: 12,635.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,378.97 : 12,916.71 = 9,174.85 : x
  2. Step 2: Convert to fraction form
    9,378.97/12,916.71 = 9,174.85/x
  3. Step 3: Cross multiply
    9,378.97x = 12,916.71 × 9,174.85
  4. Step 4: Simplify right side
    9,378.97x = 118,508,844.45
  5. Step 5: Solve for x
    x = 118,508,844.45/9,378.97
  6. Step 6: Final answer
    x = 12,635.60

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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.