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Finding the Fourth Proportional to 13,679.60, 18,880.05 and 10,326.20

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Solution

The fourth proportional to 13,679.60, 18,880.05 and 10,326.20 is: 14,251.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,679.60 : 18,880.05 = 10,326.20 : x
  2. Step 2: Convert to fraction form
    13,679.60/18,880.05 = 10,326.20/x
  3. Step 3: Cross multiply
    13,679.60x = 18,880.05 × 10,326.20
  4. Step 4: Simplify right side
    13,679.60x = 194,959,172.31
  5. Step 5: Solve for x
    x = 194,959,172.31/13,679.60
  6. Step 6: Final answer
    x = 14,251.82

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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.