Home / 28,238.90-42,344.67-8,513.78

Finding the Fourth Proportional to 28,238.90, 42,344.67 and 8,513.78

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Solution

The fourth proportional to 28,238.90, 42,344.67 and 8,513.78 is: 12,766.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,238.90 : 42,344.67 = 8,513.78 : x
  2. Step 2: Convert to fraction form
    28,238.90/42,344.67 = 8,513.78/x
  3. Step 3: Cross multiply
    28,238.90x = 42,344.67 × 8,513.78
  4. Step 4: Simplify right side
    28,238.90x = 360,513,204.55
  5. Step 5: Solve for x
    x = 360,513,204.55/28,238.90
  6. Step 6: Final answer
    x = 12,766.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.