Home / 28,515.72-39,350.10-15,768.18

Finding the Fourth Proportional to 28,515.72, 39,350.10 and 15,768.18

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Solution

The fourth proportional to 28,515.72, 39,350.10 and 15,768.18 is: 21,759.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,515.72 : 39,350.10 = 15,768.18 : x
  2. Step 2: Convert to fraction form
    28,515.72/39,350.10 = 15,768.18/x
  3. Step 3: Cross multiply
    28,515.72x = 39,350.10 × 15,768.18
  4. Step 4: Simplify right side
    28,515.72x = 620,479,459.82
  5. Step 5: Solve for x
    x = 620,479,459.82/28,515.72
  6. Step 6: Final answer
    x = 21,759.21

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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.