Home / 20,819.68-28,723.09-13,264.65

Finding the Fourth Proportional to 20,819.68, 28,723.09 and 13,264.65

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Solution

The fourth proportional to 20,819.68, 28,723.09 and 13,264.65 is: 18,300.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,819.68 : 28,723.09 = 13,264.65 : x
  2. Step 2: Convert to fraction form
    20,819.68/28,723.09 = 13,264.65/x
  3. Step 3: Cross multiply
    20,819.68x = 28,723.09 × 13,264.65
  4. Step 4: Simplify right side
    20,819.68x = 381,001,735.77
  5. Step 5: Solve for x
    x = 381,001,735.77/20,819.68
  6. Step 6: Final answer
    x = 18,300.08

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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.