Home / 20,695.40-28,552.24-13,891.08

Finding the Fourth Proportional to 20,695.40, 28,552.24 and 13,891.08

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Solution

The fourth proportional to 20,695.40, 28,552.24 and 13,891.08 is: 19,164.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,695.40 : 28,552.24 = 13,891.08 : x
  2. Step 2: Convert to fraction form
    20,695.40/28,552.24 = 13,891.08/x
  3. Step 3: Cross multiply
    20,695.40x = 28,552.24 × 13,891.08
  4. Step 4: Simplify right side
    20,695.40x = 396,621,380.56
  5. Step 5: Solve for x
    x = 396,621,380.56/20,695.40
  6. Step 6: Final answer
    x = 19,164.72

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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.