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Finding the Fourth Proportional to 26,981.60, 40,472.40 and 20,420.60

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Solution

The fourth proportional to 26,981.60, 40,472.40 and 20,420.60 is: 30,630.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,981.60 : 40,472.40 = 20,420.60 : x
  2. Step 2: Convert to fraction form
    26,981.60/40,472.40 = 20,420.60/x
  3. Step 3: Cross multiply
    26,981.60x = 40,472.40 × 20,420.60
  4. Step 4: Simplify right side
    26,981.60x = 826,470,691.44
  5. Step 5: Solve for x
    x = 826,470,691.44/26,981.60
  6. Step 6: Final answer
    x = 30,630.90

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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.