Home / 12,217.50-16,860.90-7,440.78

Finding the Fourth Proportional to 12,217.50, 16,860.90 and 7,440.78

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Solution

The fourth proportional to 12,217.50, 16,860.90 and 7,440.78 is: 10,268.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,217.50 : 16,860.90 = 7,440.78 : x
  2. Step 2: Convert to fraction form
    12,217.50/16,860.90 = 7,440.78/x
  3. Step 3: Cross multiply
    12,217.50x = 16,860.90 × 7,440.78
  4. Step 4: Simplify right side
    12,217.50x = 125,458,247.50
  5. Step 5: Solve for x
    x = 125,458,247.50/12,217.50
  6. Step 6: Final answer
    x = 10,268.73

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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.