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Finding the Fourth Proportional to 9,191.60, 12,669.70 and 7,248.10

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Solution

The fourth proportional to 9,191.60, 12,669.70 and 7,248.10 is: 9,990.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,191.60 : 12,669.70 = 7,248.10 : x
  2. Step 2: Convert to fraction form
    9,191.60/12,669.70 = 7,248.10/x
  3. Step 3: Cross multiply
    9,191.60x = 12,669.70 × 7,248.10
  4. Step 4: Simplify right side
    9,191.60x = 91,831,252.57
  5. Step 5: Solve for x
    x = 91,831,252.57/9,191.60
  6. Step 6: Final answer
    x = 9,990.78

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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.