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Finding the Fourth Proportional to 9,428.82, 13,008.02 and 5,449.20

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Solution

The fourth proportional to 9,428.82, 13,008.02 and 5,449.20 is: 7,517.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,428.82 : 13,008.02 = 5,449.20 : x
  2. Step 2: Convert to fraction form
    9,428.82/13,008.02 = 5,449.20/x
  3. Step 3: Cross multiply
    9,428.82x = 13,008.02 × 5,449.20
  4. Step 4: Simplify right side
    9,428.82x = 70,883,302.58
  5. Step 5: Solve for x
    x = 70,883,302.58/9,428.82
  6. Step 6: Final answer
    x = 7,517.73

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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.