Home / 20,689,631.87-28,549,544.00-12,740,910.66

Finding the Fourth Proportional to 20,689,631.87, 28,549,544.00 and 12,740,910.66

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Solution

The fourth proportional to 20,689,631.87, 28,549,544.00 and 12,740,910.66 is: 17,581,133.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689,631.87 : 28,549,544.00 = 12,740,910.66 : x
  2. Step 2: Convert to fraction form
    20,689,631.87/28,549,544.00 = 12,740,910.66/x
  3. Step 3: Cross multiply
    20,689,631.87x = 28,549,544.00 × 12,740,910.66
  4. Step 4: Simplify right side
    20,689,631.87x = 363,747,189,424,034.50
  5. Step 5: Solve for x
    x = 363,747,189,424,034.50/20,689,631.87
  6. Step 6: Final answer
    x = 17,581,133.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.