Home / 15,321.60-21,121.92-10,276.80

Finding the Fourth Proportional to 15,321.60, 21,121.92 and 10,276.80

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Solution

The fourth proportional to 15,321.60, 21,121.92 and 10,276.80 is: 14,167.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,321.60 : 21,121.92 = 10,276.80 : x
  2. Step 2: Convert to fraction form
    15,321.60/21,121.92 = 10,276.80/x
  3. Step 3: Cross multiply
    15,321.60x = 21,121.92 × 10,276.80
  4. Step 4: Simplify right side
    15,321.60x = 217,065,747.46
  5. Step 5: Solve for x
    x = 217,065,747.46/15,321.60
  6. Step 6: Final answer
    x = 14,167.30

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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.