Home / 20,321.16-28,052.79-15,287.30

Finding the Fourth Proportional to 20,321.16, 28,052.79 and 15,287.30

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Solution

The fourth proportional to 20,321.16, 28,052.79 and 15,287.30 is: 21,103.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,321.16 : 28,052.79 = 15,287.30 : x
  2. Step 2: Convert to fraction form
    20,321.16/28,052.79 = 15,287.30/x
  3. Step 3: Cross multiply
    20,321.16x = 28,052.79 × 15,287.30
  4. Step 4: Simplify right side
    20,321.16x = 428,851,199.87
  5. Step 5: Solve for x
    x = 428,851,199.87/20,321.16
  6. Step 6: Final answer
    x = 21,103.68

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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.