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Finding the Fourth Proportional to 18,904,530.40, 28,377,790.80 and 10,401,474.40

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Solution

The fourth proportional to 18,904,530.40, 28,377,790.80 and 10,401,474.40 is: 15,613,763.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,904,530.40 : 28,377,790.80 = 10,401,474.40 : x
  2. Step 2: Convert to fraction form
    18,904,530.40/28,377,790.80 = 10,401,474.40/x
  3. Step 3: Cross multiply
    18,904,530.40x = 28,377,790.80 × 10,401,474.40
  4. Step 4: Simplify right side
    18,904,530.40x = 295,170,864,534,755.56
  5. Step 5: Solve for x
    x = 295,170,864,534,755.56/18,904,530.40
  6. Step 6: Final answer
    x = 15,613,763.38

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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.