Home / 13,920.10-20,851.88-11,113.68

Finding the Fourth Proportional to 13,920.10, 20,851.88 and 11,113.68

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Solution

The fourth proportional to 13,920.10, 20,851.88 and 11,113.68 is: 16,647.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,920.10 : 20,851.88 = 11,113.68 : x
  2. Step 2: Convert to fraction form
    13,920.10/20,851.88 = 11,113.68/x
  3. Step 3: Cross multiply
    13,920.10x = 20,851.88 × 11,113.68
  4. Step 4: Simplify right side
    13,920.10x = 231,741,148.21
  5. Step 5: Solve for x
    x = 231,741,148.21/13,920.10
  6. Step 6: Final answer
    x = 16,647.95

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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.