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Finding the Fourth Proportional to 16,811.60, 25,218.60 and 5,124.80

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Solution

The fourth proportional to 16,811.60, 25,218.60 and 5,124.80 is: 7,687.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,811.60 : 25,218.60 = 5,124.80 : x
  2. Step 2: Convert to fraction form
    16,811.60/25,218.60 = 5,124.80/x
  3. Step 3: Cross multiply
    16,811.60x = 25,218.60 × 5,124.80
  4. Step 4: Simplify right side
    16,811.60x = 129,240,281.28
  5. Step 5: Solve for x
    x = 129,240,281.28/16,811.60
  6. Step 6: Final answer
    x = 7,687.57

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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.