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Finding the Fourth Proportional to 8,374,912.40, 12,562,368.60 and 7,815,040.40

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Solution

The fourth proportional to 8,374,912.40, 12,562,368.60 and 7,815,040.40 is: 11,722,560.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,374,912.40 : 12,562,368.60 = 7,815,040.40 : x
  2. Step 2: Convert to fraction form
    8,374,912.40/12,562,368.60 = 7,815,040.40/x
  3. Step 3: Cross multiply
    8,374,912.40x = 12,562,368.60 × 7,815,040.40
  4. Step 4: Simplify right side
    8,374,912.40x = 98,175,418,128,691.44
  5. Step 5: Solve for x
    x = 98,175,418,128,691.44/8,374,912.40
  6. Step 6: Final answer
    x = 11,722,560.60

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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.