Home / 13,992.20-21,012.60-7,431.20

Finding the Fourth Proportional to 13,992.20, 21,012.60 and 7,431.20

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Solution

The fourth proportional to 13,992.20, 21,012.60 and 7,431.20 is: 11,159.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,992.20 : 21,012.60 = 7,431.20 : x
  2. Step 2: Convert to fraction form
    13,992.20/21,012.60 = 7,431.20/x
  3. Step 3: Cross multiply
    13,992.20x = 21,012.60 × 7,431.20
  4. Step 4: Simplify right side
    13,992.20x = 156,148,833.12
  5. Step 5: Solve for x
    x = 156,148,833.12/13,992.20
  6. Step 6: Final answer
    x = 11,159.71

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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.