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Finding the Fourth Proportional to 12,866.43, 17,743.80 and 9,882.39

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Solution

The fourth proportional to 12,866.43, 17,743.80 and 9,882.39 is: 13,628.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,866.43 : 17,743.80 = 9,882.39 : x
  2. Step 2: Convert to fraction form
    12,866.43/17,743.80 = 9,882.39/x
  3. Step 3: Cross multiply
    12,866.43x = 17,743.80 × 9,882.39
  4. Step 4: Simplify right side
    12,866.43x = 175,351,151.68
  5. Step 5: Solve for x
    x = 175,351,151.68/12,866.43
  6. Step 6: Final answer
    x = 13,628.58

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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.