Home / 28,515.40-39,351.51-15,769.44

Finding the Fourth Proportional to 28,515.40, 39,351.51 and 15,769.44

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Solution

The fourth proportional to 28,515.40, 39,351.51 and 15,769.44 is: 21,761.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,515.40 : 39,351.51 = 15,769.44 : x
  2. Step 2: Convert to fraction form
    28,515.40/39,351.51 = 15,769.44/x
  3. Step 3: Cross multiply
    28,515.40x = 39,351.51 × 15,769.44
  4. Step 4: Simplify right side
    28,515.40x = 620,551,098.63
  5. Step 5: Solve for x
    x = 620,551,098.63/28,515.40
  6. Step 6: Final answer
    x = 21,761.97

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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.