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Finding the Fourth Proportional to 10,687.60, 16,012.20 and 9,458.80

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Solution

The fourth proportional to 10,687.60, 16,012.20 and 9,458.80 is: 14,171.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,687.60 : 16,012.20 = 9,458.80 : x
  2. Step 2: Convert to fraction form
    10,687.60/16,012.20 = 9,458.80/x
  3. Step 3: Cross multiply
    10,687.60x = 16,012.20 × 9,458.80
  4. Step 4: Simplify right side
    10,687.60x = 151,456,197.36
  5. Step 5: Solve for x
    x = 151,456,197.36/10,687.60
  6. Step 6: Final answer
    x = 14,171.21

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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.