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Finding the Fourth Proportional to 12,756.29, 17,603.70 and 7,167.29

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Solution

The fourth proportional to 12,756.29, 17,603.70 and 7,167.29 is: 9,890.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,756.29 : 17,603.70 = 7,167.29 : x
  2. Step 2: Convert to fraction form
    12,756.29/17,603.70 = 7,167.29/x
  3. Step 3: Cross multiply
    12,756.29x = 17,603.70 × 7,167.29
  4. Step 4: Simplify right side
    12,756.29x = 126,170,822.97
  5. Step 5: Solve for x
    x = 126,170,822.97/12,756.29
  6. Step 6: Final answer
    x = 9,890.87

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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.