Home / 20,561,867.85-30,842,801.78-7,782,789.45

Finding the Fourth Proportional to 20,561,867.85, 30,842,801.78 and 7,782,789.45

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Solution

The fourth proportional to 20,561,867.85, 30,842,801.78 and 7,782,789.45 is: 11,674,184.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,561,867.85 : 30,842,801.78 = 7,782,789.45 : x
  2. Step 2: Convert to fraction form
    20,561,867.85/30,842,801.78 = 7,782,789.45/x
  3. Step 3: Cross multiply
    20,561,867.85x = 30,842,801.78 × 7,782,789.45
  4. Step 4: Simplify right side
    20,561,867.85x = 240,043,032,262,911.28
  5. Step 5: Solve for x
    x = 240,043,032,262,911.28/20,561,867.85
  6. Step 6: Final answer
    x = 11,674,184.18

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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.