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Finding the Fourth Proportional to 13,902,002.40, 20,805,764.40 and 12,201,391.20

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Solution

The fourth proportional to 13,902,002.40, 20,805,764.40 and 12,201,391.20 is: 18,260,626.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,902,002.40 : 20,805,764.40 = 12,201,391.20 : x
  2. Step 2: Convert to fraction form
    13,902,002.40/20,805,764.40 = 12,201,391.20/x
  3. Step 3: Cross multiply
    13,902,002.40x = 20,805,764.40 × 12,201,391.20
  4. Step 4: Simplify right side
    13,902,002.40x = 253,859,270,659,433.25
  5. Step 5: Solve for x
    x = 253,859,270,659,433.25/13,902,002.40
  6. Step 6: Final answer
    x = 18,260,626.30

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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.