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Finding the Fourth Proportional to 18,403,819.20, 27,605,728.80 and 5,450,436.90

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Solution

The fourth proportional to 18,403,819.20, 27,605,728.80 and 5,450,436.90 is: 8,175,655.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,403,819.20 : 27,605,728.80 = 5,450,436.90 : x
  2. Step 2: Convert to fraction form
    18,403,819.20/27,605,728.80 = 5,450,436.90/x
  3. Step 3: Cross multiply
    18,403,819.20x = 27,605,728.80 × 5,450,436.90
  4. Step 4: Simplify right side
    18,403,819.20x = 150,463,282,902,912.72
  5. Step 5: Solve for x
    x = 150,463,282,902,912.72/18,403,819.20
  6. Step 6: Final answer
    x = 8,175,655.35

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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.