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Finding the Fourth Proportional to 13,672.16, 18,867.60 and 8,007.20

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Solution

The fourth proportional to 13,672.16, 18,867.60 and 8,007.20 is: 11,049.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,672.16 : 18,867.60 = 8,007.20 : x
  2. Step 2: Convert to fraction form
    13,672.16/18,867.60 = 8,007.20/x
  3. Step 3: Cross multiply
    13,672.16x = 18,867.60 × 8,007.20
  4. Step 4: Simplify right side
    13,672.16x = 151,076,646.72
  5. Step 5: Solve for x
    x = 151,076,646.72/13,672.16
  6. Step 6: Final answer
    x = 11,049.95

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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.