Home / 28,343.44-39,126.57-20,789.68

Finding the Fourth Proportional to 28,343.44, 39,126.57 and 20,789.68

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Solution

The fourth proportional to 28,343.44, 39,126.57 and 20,789.68 is: 28,699.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,343.44 : 39,126.57 = 20,789.68 : x
  2. Step 2: Convert to fraction form
    28,343.44/39,126.57 = 20,789.68/x
  3. Step 3: Cross multiply
    28,343.44x = 39,126.57 × 20,789.68
  4. Step 4: Simplify right side
    28,343.44x = 813,428,869.80
  5. Step 5: Solve for x
    x = 813,428,869.80/28,343.44
  6. Step 6: Final answer
    x = 28,699.02

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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.