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Finding the Fourth Proportional to 8,974.65, 12,382.51 and 5,388.64

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Solution

The fourth proportional to 8,974.65, 12,382.51 and 5,388.64 is: 7,434.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,974.65 : 12,382.51 = 5,388.64 : x
  2. Step 2: Convert to fraction form
    8,974.65/12,382.51 = 5,388.64/x
  3. Step 3: Cross multiply
    8,974.65x = 12,382.51 × 5,388.64
  4. Step 4: Simplify right side
    8,974.65x = 66,724,888.69
  5. Step 5: Solve for x
    x = 66,724,888.69/8,974.65
  6. Step 6: Final answer
    x = 7,434.82

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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.