Home / 20,291.11-28,012.22-13,992.55

Finding the Fourth Proportional to 20,291.11, 28,012.22 and 13,992.55

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Solution

The fourth proportional to 20,291.11, 28,012.22 and 13,992.55 is: 19,316.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,291.11 : 28,012.22 = 13,992.55 : x
  2. Step 2: Convert to fraction form
    20,291.11/28,012.22 = 13,992.55/x
  3. Step 3: Cross multiply
    20,291.11x = 28,012.22 × 13,992.55
  4. Step 4: Simplify right side
    20,291.11x = 391,962,388.96
  5. Step 5: Solve for x
    x = 391,962,388.96/20,291.11
  6. Step 6: Final answer
    x = 19,316.95

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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.