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Finding the Fourth Proportional to 18,841.40, 28,266.15 and 5,695.10

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Solution

The fourth proportional to 18,841.40, 28,266.15 and 5,695.10 is: 8,543.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,841.40 : 28,266.15 = 5,695.10 : x
  2. Step 2: Convert to fraction form
    18,841.40/28,266.15 = 5,695.10/x
  3. Step 3: Cross multiply
    18,841.40x = 28,266.15 × 5,695.10
  4. Step 4: Simplify right side
    18,841.40x = 160,978,550.87
  5. Step 5: Solve for x
    x = 160,978,550.87/18,841.40
  6. Step 6: Final answer
    x = 8,543.87

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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.