Home / 13,579.31-18,739.50-7,917.97

Finding the Fourth Proportional to 13,579.31, 18,739.50 and 7,917.97

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Solution

The fourth proportional to 13,579.31, 18,739.50 and 7,917.97 is: 10,926.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,579.31 : 18,739.50 = 7,917.97 : x
  2. Step 2: Convert to fraction form
    13,579.31/18,739.50 = 7,917.97/x
  3. Step 3: Cross multiply
    13,579.31x = 18,739.50 × 7,917.97
  4. Step 4: Simplify right side
    13,579.31x = 148,378,801.95
  5. Step 5: Solve for x
    x = 148,378,801.95/13,579.31
  6. Step 6: Final answer
    x = 10,926.83

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1.5x scale

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.