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Finding the Fourth Proportional to 8,679,880.76, 11,978,912.56 and 4,813,155.44

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Solution

The fourth proportional to 8,679,880.76, 11,978,912.56 and 4,813,155.44 is: 6,642,529.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679,880.76 : 11,978,912.56 = 4,813,155.44 : x
  2. Step 2: Convert to fraction form
    8,679,880.76/11,978,912.56 = 4,813,155.44/x
  3. Step 3: Cross multiply
    8,679,880.76x = 11,978,912.56 × 4,813,155.44
  4. Step 4: Simplify right side
    8,679,880.76x = 57,656,368,153,448.34
  5. Step 5: Solve for x
    x = 57,656,368,153,448.34/8,679,880.76
  6. Step 6: Final answer
    x = 6,642,529.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.