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Finding the Fourth Proportional to 9,479.71, 13,082.82 and 5,231.17

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Solution

The fourth proportional to 9,479.71, 13,082.82 and 5,231.17 is: 7,219.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,479.71 : 13,082.82 = 5,231.17 : x
  2. Step 2: Convert to fraction form
    9,479.71/13,082.82 = 5,231.17/x
  3. Step 3: Cross multiply
    9,479.71x = 13,082.82 × 5,231.17
  4. Step 4: Simplify right side
    9,479.71x = 68,438,390.09
  5. Step 5: Solve for x
    x = 68,438,390.09/9,479.71
  6. Step 6: Final answer
    x = 7,219.46

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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.