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Finding the Fourth Proportional to 12,756.80, 17,603.52 and 7,167.68

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Solution

The fourth proportional to 12,756.80, 17,603.52 and 7,167.68 is: 9,890.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,756.80 : 17,603.52 = 7,167.68 : x
  2. Step 2: Convert to fraction form
    12,756.80/17,603.52 = 7,167.68/x
  3. Step 3: Cross multiply
    12,756.80x = 17,603.52 × 7,167.68
  4. Step 4: Simplify right side
    12,756.80x = 126,176,398.23
  5. Step 5: Solve for x
    x = 126,176,398.23/12,756.80
  6. Step 6: Final answer
    x = 9,890.91

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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.