Home / 20,867.06-28,779.78-18,343.80

Finding the Fourth Proportional to 20,867.06, 28,779.78 and 18,343.80

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Solution

The fourth proportional to 20,867.06, 28,779.78 and 18,343.80 is: 25,299.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,867.06 : 28,779.78 = 18,343.80 : x
  2. Step 2: Convert to fraction form
    20,867.06/28,779.78 = 18,343.80/x
  3. Step 3: Cross multiply
    20,867.06x = 28,779.78 × 18,343.80
  4. Step 4: Simplify right side
    20,867.06x = 527,930,528.36
  5. Step 5: Solve for x
    x = 527,930,528.36/20,867.06
  6. Step 6: Final answer
    x = 25,299.71

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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.