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Finding the Fourth Proportional to 12,732.48, 17,570.88 and 7,143.48

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Solution

The fourth proportional to 12,732.48, 17,570.88 and 7,143.48 is: 9,858.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,732.48 : 17,570.88 = 7,143.48 : x
  2. Step 2: Convert to fraction form
    12,732.48/17,570.88 = 7,143.48/x
  3. Step 3: Cross multiply
    12,732.48x = 17,570.88 × 7,143.48
  4. Step 4: Simplify right side
    12,732.48x = 125,517,229.86
  5. Step 5: Solve for x
    x = 125,517,229.86/12,732.48
  6. Step 6: Final answer
    x = 9,858.03

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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.