Home / 20,615.82-28,449.69-11,184.39

Finding the Fourth Proportional to 20,615.82, 28,449.69 and 11,184.39

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Solution

The fourth proportional to 20,615.82, 28,449.69 and 11,184.39 is: 15,434.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,615.82 : 28,449.69 = 11,184.39 : x
  2. Step 2: Convert to fraction form
    20,615.82/28,449.69 = 11,184.39/x
  3. Step 3: Cross multiply
    20,615.82x = 28,449.69 × 11,184.39
  4. Step 4: Simplify right side
    20,615.82x = 318,192,428.34
  5. Step 5: Solve for x
    x = 318,192,428.34/20,615.82
  6. Step 6: Final answer
    x = 15,434.38

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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.