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Finding the Fourth Proportional to 28,487.34, 42,727.65 and 17,926.20

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Solution

The fourth proportional to 28,487.34, 42,727.65 and 17,926.20 is: 26,887.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,487.34 : 42,727.65 = 17,926.20 : x
  2. Step 2: Convert to fraction form
    28,487.34/42,727.65 = 17,926.20/x
  3. Step 3: Cross multiply
    28,487.34x = 42,727.65 × 17,926.20
  4. Step 4: Simplify right side
    28,487.34x = 765,944,399.43
  5. Step 5: Solve for x
    x = 765,944,399.43/28,487.34
  6. Step 6: Final answer
    x = 26,887.19

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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.