Home / 12,428,138.70-18,642,208.05-3,911,085.90

Finding the Fourth Proportional to 12,428,138.70, 18,642,208.05 and 3,911,085.90

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Solution

The fourth proportional to 12,428,138.70, 18,642,208.05 and 3,911,085.90 is: 5,866,628.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,428,138.70 : 18,642,208.05 = 3,911,085.90 : x
  2. Step 2: Convert to fraction form
    12,428,138.70/18,642,208.05 = 3,911,085.90/x
  3. Step 3: Cross multiply
    12,428,138.70x = 18,642,208.05 × 3,911,085.90
  4. Step 4: Simplify right side
    12,428,138.70x = 72,911,277,049,221.50
  5. Step 5: Solve for x
    x = 72,911,277,049,221.50/12,428,138.70
  6. Step 6: Final answer
    x = 5,866,628.85

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Similar ratio
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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.