Home / 20,681.62-28,525.36-13,121.44

Finding the Fourth Proportional to 20,681.62, 28,525.36 and 13,121.44

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Solution

The fourth proportional to 20,681.62, 28,525.36 and 13,121.44 is: 18,097.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,681.62 : 28,525.36 = 13,121.44 : x
  2. Step 2: Convert to fraction form
    20,681.62/28,525.36 = 13,121.44/x
  3. Step 3: Cross multiply
    20,681.62x = 28,525.36 × 13,121.44
  4. Step 4: Simplify right side
    20,681.62x = 374,293,799.72
  5. Step 5: Solve for x
    x = 374,293,799.72/20,681.62
  6. Step 6: Final answer
    x = 18,097.90

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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.