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Finding the Fourth Proportional to 18,695.20, 28,042.80 and 17,723.20

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Solution

The fourth proportional to 18,695.20, 28,042.80 and 17,723.20 is: 26,584.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,695.20 : 28,042.80 = 17,723.20 : x
  2. Step 2: Convert to fraction form
    18,695.20/28,042.80 = 17,723.20/x
  3. Step 3: Cross multiply
    18,695.20x = 28,042.80 × 17,723.20
  4. Step 4: Simplify right side
    18,695.20x = 497,008,152.96
  5. Step 5: Solve for x
    x = 497,008,152.96/18,695.20
  6. Step 6: Final answer
    x = 26,584.80

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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.