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Finding the Fourth Proportional to 13,904,908.40, 20,857,362.60 and 3,807,513.20

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Solution

The fourth proportional to 13,904,908.40, 20,857,362.60 and 3,807,513.20 is: 5,711,269.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,904,908.40 : 20,857,362.60 = 3,807,513.20 : x
  2. Step 2: Convert to fraction form
    13,904,908.40/20,857,362.60 = 3,807,513.20/x
  3. Step 3: Cross multiply
    13,904,908.40x = 20,857,362.60 × 3,807,513.20
  4. Step 4: Simplify right side
    13,904,908.40x = 79,414,683,416,686.33
  5. Step 5: Solve for x
    x = 79,414,683,416,686.33/13,904,908.40
  6. Step 6: Final answer
    x = 5,711,269.80

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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.