Home / 28,531.70-39,371.96-15,784.58

Finding the Fourth Proportional to 28,531.70, 39,371.96 and 15,784.58

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Solution

The fourth proportional to 28,531.70, 39,371.96 and 15,784.58 is: 21,781.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,531.70 : 39,371.96 = 15,784.58 : x
  2. Step 2: Convert to fraction form
    28,531.70/39,371.96 = 15,784.58/x
  3. Step 3: Cross multiply
    28,531.70x = 39,371.96 × 15,784.58
  4. Step 4: Simplify right side
    28,531.70x = 621,469,852.38
  5. Step 5: Solve for x
    x = 621,469,852.38/28,531.70
  6. Step 6: Final answer
    x = 21,781.73

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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.