Home / 20,992.56-28,988.97-13,338.30

Finding the Fourth Proportional to 20,992.56, 28,988.97 and 13,338.30

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Solution

The fourth proportional to 20,992.56, 28,988.97 and 13,338.30 is: 18,419.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,992.56 : 28,988.97 = 13,338.30 : x
  2. Step 2: Convert to fraction form
    20,992.56/28,988.97 = 13,338.30/x
  3. Step 3: Cross multiply
    20,992.56x = 28,988.97 × 13,338.30
  4. Step 4: Simplify right side
    20,992.56x = 386,663,578.55
  5. Step 5: Solve for x
    x = 386,663,578.55/20,992.56
  6. Step 6: Final answer
    x = 18,419.08

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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.