Home / 20,711.90-31,067.65-13,690.22

Finding the Fourth Proportional to 20,711.90, 31,067.65 and 13,690.22

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Solution

The fourth proportional to 20,711.90, 31,067.65 and 13,690.22 is: 20,535.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,711.90 : 31,067.65 = 13,690.22 : x
  2. Step 2: Convert to fraction form
    20,711.90/31,067.65 = 13,690.22/x
  3. Step 3: Cross multiply
    20,711.90x = 31,067.65 × 13,690.22
  4. Step 4: Simplify right side
    20,711.90x = 425,322,825.16
  5. Step 5: Solve for x
    x = 425,322,825.16/20,711.90
  6. Step 6: Final answer
    x = 20,535.19

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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.