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Finding the Fourth Proportional to 18,794,880.70, 28,173,658.65 and 8,679,859.90

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Solution

The fourth proportional to 18,794,880.70, 28,173,658.65 and 8,679,859.90 is: 13,011,171.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,794,880.70 : 28,173,658.65 = 8,679,859.90 : x
  2. Step 2: Convert to fraction form
    18,794,880.70/28,173,658.65 = 8,679,859.90/x
  3. Step 3: Cross multiply
    18,794,880.70x = 28,173,658.65 × 8,679,859.90
  4. Step 4: Simplify right side
    18,794,880.70x = 244,543,409,952,423.12
  5. Step 5: Solve for x
    x = 244,543,409,952,423.12/18,794,880.70
  6. Step 6: Final answer
    x = 13,011,171.17

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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.