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Finding the Fourth Proportional to 9,370.92, 12,931.92 and 5,179.18

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Solution

The fourth proportional to 9,370.92, 12,931.92 and 5,179.18 is: 7,147.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,370.92 : 12,931.92 = 5,179.18 : x
  2. Step 2: Convert to fraction form
    9,370.92/12,931.92 = 5,179.18/x
  3. Step 3: Cross multiply
    9,370.92x = 12,931.92 × 5,179.18
  4. Step 4: Simplify right side
    9,370.92x = 66,976,741.43
  5. Step 5: Solve for x
    x = 66,976,741.43/9,370.92
  6. Step 6: Final answer
    x = 7,147.30

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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.