Home / 13,611.18-20,418.08-5,291.85

Finding the Fourth Proportional to 13,611.18, 20,418.08 and 5,291.85

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Solution

The fourth proportional to 13,611.18, 20,418.08 and 5,291.85 is: 7,938.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,611.18 : 20,418.08 = 5,291.85 : x
  2. Step 2: Convert to fraction form
    13,611.18/20,418.08 = 5,291.85/x
  3. Step 3: Cross multiply
    13,611.18x = 20,418.08 × 5,291.85
  4. Step 4: Simplify right side
    13,611.18x = 108,049,390.19
  5. Step 5: Solve for x
    x = 108,049,390.19/13,611.18
  6. Step 6: Final answer
    x = 7,938.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.