Home / 20,615.67-28,449.50-11,184.21

Finding the Fourth Proportional to 20,615.67, 28,449.50 and 11,184.21

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Solution

The fourth proportional to 20,615.67, 28,449.50 and 11,184.21 is: 15,434.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,615.67 : 28,449.50 = 11,184.21 : x
  2. Step 2: Convert to fraction form
    20,615.67/28,449.50 = 11,184.21/x
  3. Step 3: Cross multiply
    20,615.67x = 28,449.50 × 11,184.21
  4. Step 4: Simplify right side
    20,615.67x = 318,185,126.47
  5. Step 5: Solve for x
    x = 318,185,126.47/20,615.67
  6. Step 6: Final answer
    x = 15,434.14

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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.