Home / 28,772.76-39,691.26-18,687.72

Finding the Fourth Proportional to 28,772.76, 39,691.26 and 18,687.72

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Solution

The fourth proportional to 28,772.76, 39,691.26 and 18,687.72 is: 25,779.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,772.76 : 39,691.26 = 18,687.72 : x
  2. Step 2: Convert to fraction form
    28,772.76/39,691.26 = 18,687.72/x
  3. Step 3: Cross multiply
    28,772.76x = 39,691.26 × 18,687.72
  4. Step 4: Simplify right side
    28,772.76x = 741,739,153.33
  5. Step 5: Solve for x
    x = 741,739,153.33/28,772.76
  6. Step 6: Final answer
    x = 25,779.21

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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.