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Finding the Fourth Proportional to 8,691,604.40, 13,038,961.80 and 3,643,425.20

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Solution

The fourth proportional to 8,691,604.40, 13,038,961.80 and 3,643,425.20 is: 5,465,789.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,691,604.40 : 13,038,961.80 = 3,643,425.20 : x
  2. Step 2: Convert to fraction form
    8,691,604.40/13,038,961.80 = 3,643,425.20/x
  3. Step 3: Cross multiply
    8,691,604.40x = 13,038,961.80 × 3,643,425.20
  4. Step 4: Simplify right side
    8,691,604.40x = 47,506,482,003,957.37
  5. Step 5: Solve for x
    x = 47,506,482,003,957.37/8,691,604.40
  6. Step 6: Final answer
    x = 5,465,789.72

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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.