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Finding the Fourth Proportional to 8,304,307.80, 12,456,461.70 and 7,985,443.20

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Solution

The fourth proportional to 8,304,307.80, 12,456,461.70 and 7,985,443.20 is: 11,978,164.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,304,307.80 : 12,456,461.70 = 7,985,443.20 : x
  2. Step 2: Convert to fraction form
    8,304,307.80/12,456,461.70 = 7,985,443.20/x
  3. Step 3: Cross multiply
    8,304,307.80x = 12,456,461.70 × 7,985,443.20
  4. Step 4: Simplify right side
    8,304,307.80x = 99,470,367,378,325.44
  5. Step 5: Solve for x
    x = 99,470,367,378,325.44/8,304,307.80
  6. Step 6: Final answer
    x = 11,978,164.80

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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.