Home / 20,617.40-28,452-11,185.98

Finding the Fourth Proportional to 20,617.40, 28,452 and 11,185.98

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Solution

The fourth proportional to 20,617.40, 28,452 and 11,185.98 is: 15,436.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,617.40 : 28,452 = 11,185.98 : x
  2. Step 2: Convert to fraction form
    20,617.40/28,452 = 11,185.98/x
  3. Step 3: Cross multiply
    20,617.40x = 28,452 × 11,185.98
  4. Step 4: Simplify right side
    20,617.40x = 318,263,502.96
  5. Step 5: Solve for x
    x = 318,263,502.96/20,617.40
  6. Step 6: Final answer
    x = 15,436.65

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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.