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Finding the Fourth Proportional to 26,812.60, 40,218.90 and 20,591.80

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Solution

The fourth proportional to 26,812.60, 40,218.90 and 20,591.80 is: 30,887.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,812.60 : 40,218.90 = 20,591.80 : x
  2. Step 2: Convert to fraction form
    26,812.60/40,218.90 = 20,591.80/x
  3. Step 3: Cross multiply
    26,812.60x = 40,218.90 × 20,591.80
  4. Step 4: Simplify right side
    26,812.60x = 828,179,545.02
  5. Step 5: Solve for x
    x = 828,179,545.02/26,812.60
  6. Step 6: Final answer
    x = 30,887.70

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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.