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Finding the Fourth Proportional to 8,693,990.80, 13,040,986.20 and 7,287,312.40

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Solution

The fourth proportional to 8,693,990.80, 13,040,986.20 and 7,287,312.40 is: 10,930,968.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,693,990.80 : 13,040,986.20 = 7,287,312.40 : x
  2. Step 2: Convert to fraction form
    8,693,990.80/13,040,986.20 = 7,287,312.40/x
  3. Step 3: Cross multiply
    8,693,990.80x = 13,040,986.20 × 7,287,312.40
  4. Step 4: Simplify right side
    8,693,990.80x = 95,033,740,443,488.88
  5. Step 5: Solve for x
    x = 95,033,740,443,488.88/8,693,990.80
  6. Step 6: Final answer
    x = 10,930,968.60

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Similar ratio
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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.