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Finding the Fourth Proportional to 18,715,829.70, 28,073,744.55 and 10,212,773.70

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Solution

The fourth proportional to 18,715,829.70, 28,073,744.55 and 10,212,773.70 is: 15,319,160.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,715,829.70 : 28,073,744.55 = 10,212,773.70 : x
  2. Step 2: Convert to fraction form
    18,715,829.70/28,073,744.55 = 10,212,773.70/x
  3. Step 3: Cross multiply
    18,715,829.70x = 28,073,744.55 × 10,212,773.70
  4. Step 4: Simplify right side
    18,715,829.70x = 286,710,800,000,758.31
  5. Step 5: Solve for x
    x = 286,710,800,000,758.31/18,715,829.70
  6. Step 6: Final answer
    x = 15,319,160.55

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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.