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Finding the Fourth Proportional to 13,672.71, 20,511.80 and 4,313.60

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Solution

The fourth proportional to 13,672.71, 20,511.80 and 4,313.60 is: 6,471.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,672.71 : 20,511.80 = 4,313.60 : x
  2. Step 2: Convert to fraction form
    13,672.71/20,511.80 = 4,313.60/x
  3. Step 3: Cross multiply
    13,672.71x = 20,511.80 × 4,313.60
  4. Step 4: Simplify right side
    13,672.71x = 88,479,700.48
  5. Step 5: Solve for x
    x = 88,479,700.48/13,672.71
  6. Step 6: Final answer
    x = 6,471.26

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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.