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Finding the Fourth Proportional to 8,538,571.20, 12,807,856.80 and 5,668,789.80

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Solution

The fourth proportional to 8,538,571.20, 12,807,856.80 and 5,668,789.80 is: 8,503,184.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,538,571.20 : 12,807,856.80 = 5,668,789.80 : x
  2. Step 2: Convert to fraction form
    8,538,571.20/12,807,856.80 = 5,668,789.80/x
  3. Step 3: Cross multiply
    8,538,571.20x = 12,807,856.80 × 5,668,789.80
  4. Step 4: Simplify right side
    8,538,571.20x = 72,605,047,987,700.64
  5. Step 5: Solve for x
    x = 72,605,047,987,700.64/8,538,571.20
  6. Step 6: Final answer
    x = 8,503,184.70

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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.