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Finding the Fourth Proportional to 10,369,879.70, 15,554,819.55 and 8,205,041.30

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Solution

The fourth proportional to 10,369,879.70, 15,554,819.55 and 8,205,041.30 is: 12,307,561.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,369,879.70 : 15,554,819.55 = 8,205,041.30 : x
  2. Step 2: Convert to fraction form
    10,369,879.70/15,554,819.55 = 8,205,041.30/x
  3. Step 3: Cross multiply
    10,369,879.70x = 15,554,819.55 × 8,205,041.30
  4. Step 4: Simplify right side
    10,369,879.70x = 127,627,936,821,797.42
  5. Step 5: Solve for x
    x = 127,627,936,821,797.42/10,369,879.70
  6. Step 6: Final answer
    x = 12,307,561.95

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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.