Home / 20,819.13-31,228.71-5,236.75

Finding the Fourth Proportional to 20,819.13, 31,228.71 and 5,236.75

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Solution

The fourth proportional to 20,819.13, 31,228.71 and 5,236.75 is: 7,855.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,819.13 : 31,228.71 = 5,236.75 : x
  2. Step 2: Convert to fraction form
    20,819.13/31,228.71 = 5,236.75/x
  3. Step 3: Cross multiply
    20,819.13x = 31,228.71 × 5,236.75
  4. Step 4: Simplify right side
    20,819.13x = 163,536,947.09
  5. Step 5: Solve for x
    x = 163,536,947.09/20,819.13
  6. Step 6: Final answer
    x = 7,855.13

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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.