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Finding the Fourth Proportional to 12,475,894.80, 18,693,721.80 and 7,068,464.40

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Solution

The fourth proportional to 12,475,894.80, 18,693,721.80 and 7,068,464.40 is: 10,591,296.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,475,894.80 : 18,693,721.80 = 7,068,464.40 : x
  2. Step 2: Convert to fraction form
    12,475,894.80/18,693,721.80 = 7,068,464.40/x
  3. Step 3: Cross multiply
    12,475,894.80x = 18,693,721.80 × 7,068,464.40
  4. Step 4: Simplify right side
    12,475,894.80x = 132,135,907,046,803.94
  5. Step 5: Solve for x
    x = 132,135,907,046,803.94/12,475,894.80
  6. Step 6: Final answer
    x = 10,591,296.99

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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.