Home / 20,819.12-31,260.36-18,185.12

Finding the Fourth Proportional to 20,819.12, 31,260.36 and 18,185.12

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Solution

The fourth proportional to 20,819.12, 31,260.36 and 18,185.12 is: 27,305.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,819.12 : 31,260.36 = 18,185.12 : x
  2. Step 2: Convert to fraction form
    20,819.12/31,260.36 = 18,185.12/x
  3. Step 3: Cross multiply
    20,819.12x = 31,260.36 × 18,185.12
  4. Step 4: Simplify right side
    20,819.12x = 568,473,397.84
  5. Step 5: Solve for x
    x = 568,473,397.84/20,819.12
  6. Step 6: Final answer
    x = 27,305.35

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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.