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Finding the Fourth Proportional to 18,843.60, 26,008.80 and 10,890.60

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Solution

The fourth proportional to 18,843.60, 26,008.80 and 10,890.60 is: 15,031.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,843.60 : 26,008.80 = 10,890.60 : x
  2. Step 2: Convert to fraction form
    18,843.60/26,008.80 = 10,890.60/x
  3. Step 3: Cross multiply
    18,843.60x = 26,008.80 × 10,890.60
  4. Step 4: Simplify right side
    18,843.60x = 283,251,437.28
  5. Step 5: Solve for x
    x = 283,251,437.28/18,843.60
  6. Step 6: Final answer
    x = 15,031.71

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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.