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Finding the Fourth Proportional to 8,572.80, 11,841.80 and 6,900.47

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Solution

The fourth proportional to 8,572.80, 11,841.80 and 6,900.47 is: 9,531.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,572.80 : 11,841.80 = 6,900.47 : x
  2. Step 2: Convert to fraction form
    8,572.80/11,841.80 = 6,900.47/x
  3. Step 3: Cross multiply
    8,572.80x = 11,841.80 × 6,900.47
  4. Step 4: Simplify right side
    8,572.80x = 81,713,891.93
  5. Step 5: Solve for x
    x = 81,713,891.93/8,572.80
  6. Step 6: Final answer
    x = 9,531.76

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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.