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Finding the Fourth Proportional to 18,487.68, 27,749.34 and 17,488.68

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Solution

The fourth proportional to 18,487.68, 27,749.34 and 17,488.68 is: 26,249.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,487.68 : 27,749.34 = 17,488.68 : x
  2. Step 2: Convert to fraction form
    18,487.68/27,749.34 = 17,488.68/x
  3. Step 3: Cross multiply
    18,487.68x = 27,749.34 × 17,488.68
  4. Step 4: Simplify right side
    18,487.68x = 485,299,327.47
  5. Step 5: Solve for x
    x = 485,299,327.47/18,487.68
  6. Step 6: Final answer
    x = 26,249.88

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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.