Home / 20,694.88-28,555.16-13,522.90

Finding the Fourth Proportional to 20,694.88, 28,555.16 and 13,522.90

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Solution

The fourth proportional to 20,694.88, 28,555.16 and 13,522.90 is: 18,659.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,694.88 : 28,555.16 = 13,522.90 : x
  2. Step 2: Convert to fraction form
    20,694.88/28,555.16 = 13,522.90/x
  3. Step 3: Cross multiply
    20,694.88x = 28,555.16 × 13,522.90
  4. Step 4: Simplify right side
    20,694.88x = 386,148,573.16
  5. Step 5: Solve for x
    x = 386,148,573.16/20,694.88
  6. Step 6: Final answer
    x = 18,659.14

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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.