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Finding the Fourth Proportional to 13,147.92, 18,143.92 and 7,179.46

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Solution

The fourth proportional to 13,147.92, 18,143.92 and 7,179.46 is: 9,907.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,147.92 : 18,143.92 = 7,179.46 : x
  2. Step 2: Convert to fraction form
    13,147.92/18,143.92 = 7,179.46/x
  3. Step 3: Cross multiply
    13,147.92x = 18,143.92 × 7,179.46
  4. Step 4: Simplify right side
    13,147.92x = 130,263,547.88
  5. Step 5: Solve for x
    x = 130,263,547.88/13,147.92
  6. Step 6: Final answer
    x = 9,907.54

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Double scale
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Similar ratio
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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.