Home / 20,687,270.87-28,548,433.69-11,990,488

Finding the Fourth Proportional to 20,687,270.87, 28,548,433.69 and 11,990,488

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Solution

The fourth proportional to 20,687,270.87, 28,548,433.69 and 11,990,488 is: 16,546,873.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,687,270.87 : 28,548,433.69 = 11,990,488 : x
  2. Step 2: Convert to fraction form
    20,687,270.87/28,548,433.69 = 11,990,488/x
  3. Step 3: Cross multiply
    20,687,270.87x = 28,548,433.69 × 11,990,488
  4. Step 4: Simplify right side
    20,687,270.87x = 342,309,651,578,740.75
  5. Step 5: Solve for x
    x = 342,309,651,578,740.75/20,687,270.87
  6. Step 6: Final answer
    x = 16,546,873.38

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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.