Home / 20,643.52-31,015.92-13,251.04

Finding the Fourth Proportional to 20,643.52, 31,015.92 and 13,251.04

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Solution

The fourth proportional to 20,643.52, 31,015.92 and 13,251.04 is: 19,909.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.52 : 31,015.92 = 13,251.04 : x
  2. Step 2: Convert to fraction form
    20,643.52/31,015.92 = 13,251.04/x
  3. Step 3: Cross multiply
    20,643.52x = 31,015.92 × 13,251.04
  4. Step 4: Simplify right side
    20,643.52x = 410,993,196.56
  5. Step 5: Solve for x
    x = 410,993,196.56/20,643.52
  6. Step 6: Final answer
    x = 19,909.07

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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.