Home / 28,105.30-38,775.21-18,039.28

Finding the Fourth Proportional to 28,105.30, 38,775.21 and 18,039.28

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Solution

The fourth proportional to 28,105.30, 38,775.21 and 18,039.28 is: 24,887.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,105.30 : 38,775.21 = 18,039.28 : x
  2. Step 2: Convert to fraction form
    28,105.30/38,775.21 = 18,039.28/x
  3. Step 3: Cross multiply
    28,105.30x = 38,775.21 × 18,039.28
  4. Step 4: Simplify right side
    28,105.30x = 699,476,773.31
  5. Step 5: Solve for x
    x = 699,476,773.31/28,105.30
  6. Step 6: Final answer
    x = 24,887.72

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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.