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Finding the Fourth Proportional to 9,349.87, 12,902.87 and 5,158.12

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Solution

The fourth proportional to 9,349.87, 12,902.87 and 5,158.12 is: 7,118.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,349.87 : 12,902.87 = 5,158.12 : x
  2. Step 2: Convert to fraction form
    9,349.87/12,902.87 = 5,158.12/x
  3. Step 3: Cross multiply
    9,349.87x = 12,902.87 × 5,158.12
  4. Step 4: Simplify right side
    9,349.87x = 66,554,551.80
  5. Step 5: Solve for x
    x = 66,554,551.80/9,349.87
  6. Step 6: Final answer
    x = 7,118.23

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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.