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Finding the Fourth Proportional to 9,362.20, 12,916.92 and 5,381.88

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Solution

The fourth proportional to 9,362.20, 12,916.92 and 5,381.88 is: 7,425.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,362.20 : 12,916.92 = 5,381.88 : x
  2. Step 2: Convert to fraction form
    9,362.20/12,916.92 = 5,381.88/x
  3. Step 3: Cross multiply
    9,362.20x = 12,916.92 × 5,381.88
  4. Step 4: Simplify right side
    9,362.20x = 69,517,313.41
  5. Step 5: Solve for x
    x = 69,517,313.41/9,362.20
  6. Step 6: Final answer
    x = 7,425.32

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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.