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Finding the Fourth Proportional to 18,499.70, 27,761.70 and 10,602.20

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Solution

The fourth proportional to 18,499.70, 27,761.70 and 10,602.20 is: 15,910.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,499.70 : 27,761.70 = 10,602.20 : x
  2. Step 2: Convert to fraction form
    18,499.70/27,761.70 = 10,602.20/x
  3. Step 3: Cross multiply
    18,499.70x = 27,761.70 × 10,602.20
  4. Step 4: Simplify right side
    18,499.70x = 294,335,095.74
  5. Step 5: Solve for x
    x = 294,335,095.74/18,499.70
  6. Step 6: Final answer
    x = 15,910.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.