Home / 15,321.28-21,151.44-10,311.84

Finding the Fourth Proportional to 15,321.28, 21,151.44 and 10,311.84

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Solution

The fourth proportional to 15,321.28, 21,151.44 and 10,311.84 is: 14,235.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,321.28 : 21,151.44 = 10,311.84 : x
  2. Step 2: Convert to fraction form
    15,321.28/21,151.44 = 10,311.84/x
  3. Step 3: Cross multiply
    15,321.28x = 21,151.44 × 10,311.84
  4. Step 4: Simplify right side
    15,321.28x = 218,110,265.05
  5. Step 5: Solve for x
    x = 218,110,265.05/15,321.28
  6. Step 6: Final answer
    x = 14,235.77

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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.