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Finding the Fourth Proportional to 12,861.13, 17,749.05 and 7,195.54

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Solution

The fourth proportional to 12,861.13, 17,749.05 and 7,195.54 is: 9,930.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,861.13 : 17,749.05 = 7,195.54 : x
  2. Step 2: Convert to fraction form
    12,861.13/17,749.05 = 7,195.54/x
  3. Step 3: Cross multiply
    12,861.13x = 17,749.05 × 7,195.54
  4. Step 4: Simplify right side
    12,861.13x = 127,713,981.25
  5. Step 5: Solve for x
    x = 127,713,981.25/12,861.13
  6. Step 6: Final answer
    x = 9,930.23

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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.