Home / 20,990.02-28,942.23-15,675.88

Finding the Fourth Proportional to 20,990.02, 28,942.23 and 15,675.88

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Solution

The fourth proportional to 20,990.02, 28,942.23 and 15,675.88 is: 21,614.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,990.02 : 28,942.23 = 15,675.88 : x
  2. Step 2: Convert to fraction form
    20,990.02/28,942.23 = 15,675.88/x
  3. Step 3: Cross multiply
    20,990.02x = 28,942.23 × 15,675.88
  4. Step 4: Simplify right side
    20,990.02x = 453,694,924.41
  5. Step 5: Solve for x
    x = 453,694,924.41/20,990.02
  6. Step 6: Final answer
    x = 21,614.79

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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.