Home / 20,856,789.55-28,785,335.69-11,566,425.86

Finding the Fourth Proportional to 20,856,789.55, 28,785,335.69 and 11,566,425.86

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Solution

The fourth proportional to 20,856,789.55, 28,785,335.69 and 11,566,425.86 is: 15,963,312.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,856,789.55 : 28,785,335.69 = 11,566,425.86 : x
  2. Step 2: Convert to fraction form
    20,856,789.55/28,785,335.69 = 11,566,425.86/x
  3. Step 3: Cross multiply
    20,856,789.55x = 28,785,335.69 × 11,566,425.86
  4. Step 4: Simplify right side
    20,856,789.55x = 332,943,450,993,010.31
  5. Step 5: Solve for x
    x = 332,943,450,993,010.31/20,856,789.55
  6. Step 6: Final answer
    x = 15,963,312.58

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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.