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Finding the Fourth Proportional to 8,361,142.80, 12,551,045.40 and 7,812,934.80

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Solution

The fourth proportional to 8,361,142.80, 12,551,045.40 and 7,812,934.80 is: 11,728,121.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,361,142.80 : 12,551,045.40 = 7,812,934.80 : x
  2. Step 2: Convert to fraction form
    8,361,142.80/12,551,045.40 = 7,812,934.80/x
  3. Step 3: Cross multiply
    8,361,142.80x = 12,551,045.40 × 7,812,934.80
  4. Step 4: Simplify right side
    8,361,142.80x = 98,060,499,382,039.92
  5. Step 5: Solve for x
    x = 98,060,499,382,039.92/8,361,142.80
  6. Step 6: Final answer
    x = 11,728,121.59

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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.