Home / 20,689,675.92-28,549,604.84-12,740,954.70

Finding the Fourth Proportional to 20,689,675.92, 28,549,604.84 and 12,740,954.70

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Solution

The fourth proportional to 20,689,675.92, 28,549,604.84 and 12,740,954.70 is: 17,581,194.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689,675.92 : 28,549,604.84 = 12,740,954.70 : x
  2. Step 2: Convert to fraction form
    20,689,675.92/28,549,604.84 = 12,740,954.70/x
  3. Step 3: Cross multiply
    20,689,675.92x = 28,549,604.84 × 12,740,954.70
  4. Step 4: Simplify right side
    20,689,675.92x = 363,749,221,969,340.75
  5. Step 5: Solve for x
    x = 363,749,221,969,340.75/20,689,675.92
  6. Step 6: Final answer
    x = 17,581,194.76

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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.