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Finding the Fourth Proportional to 9,387.92, 12,955.60 and 5,196.16

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Solution

The fourth proportional to 9,387.92, 12,955.60 and 5,196.16 is: 7,170.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,387.92 : 12,955.60 = 5,196.16 : x
  2. Step 2: Convert to fraction form
    9,387.92/12,955.60 = 5,196.16/x
  3. Step 3: Cross multiply
    9,387.92x = 12,955.60 × 5,196.16
  4. Step 4: Simplify right side
    9,387.92x = 67,319,370.50
  5. Step 5: Solve for x
    x = 67,319,370.50/9,387.92
  6. Step 6: Final answer
    x = 7,170.85

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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.