Home / 13,977.90-20,939.31-7,387.74

Finding the Fourth Proportional to 13,977.90, 20,939.31 and 7,387.74

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Solution

The fourth proportional to 13,977.90, 20,939.31 and 7,387.74 is: 11,067.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,977.90 : 20,939.31 = 7,387.74 : x
  2. Step 2: Convert to fraction form
    13,977.90/20,939.31 = 7,387.74/x
  3. Step 3: Cross multiply
    13,977.90x = 20,939.31 × 7,387.74
  4. Step 4: Simplify right side
    13,977.90x = 154,694,178.06
  5. Step 5: Solve for x
    x = 154,694,178.06/13,977.90
  6. Step 6: Final answer
    x = 11,067.05

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1.5x scale

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.