Home / 12,255.28-16,915.35-7,217.66

Finding the Fourth Proportional to 12,255.28, 16,915.35 and 7,217.66

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Solution

The fourth proportional to 12,255.28, 16,915.35 and 7,217.66 is: 9,962.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,255.28 : 16,915.35 = 7,217.66 : x
  2. Step 2: Convert to fraction form
    12,255.28/16,915.35 = 7,217.66/x
  3. Step 3: Cross multiply
    12,255.28x = 16,915.35 × 7,217.66
  4. Step 4: Simplify right side
    12,255.28x = 122,089,245.08
  5. Step 5: Solve for x
    x = 122,089,245.08/12,255.28
  6. Step 6: Final answer
    x = 9,962.18

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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.