Home / 20,538.36-28,294.92-16,990.56

Finding the Fourth Proportional to 20,538.36, 28,294.92 and 16,990.56

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Solution

The fourth proportional to 20,538.36, 28,294.92 and 16,990.56 is: 23,407.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,538.36 : 28,294.92 = 16,990.56 : x
  2. Step 2: Convert to fraction form
    20,538.36/28,294.92 = 16,990.56/x
  3. Step 3: Cross multiply
    20,538.36x = 28,294.92 × 16,990.56
  4. Step 4: Simplify right side
    20,538.36x = 480,746,535.96
  5. Step 5: Solve for x
    x = 480,746,535.96/20,538.36
  6. Step 6: Final answer
    x = 23,407.25

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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.