Home / 20,245.85-27,958.52-15,521.93

Finding the Fourth Proportional to 20,245.85, 27,958.52 and 15,521.93

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Solution

The fourth proportional to 20,245.85, 27,958.52 and 15,521.93 is: 21,435.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,245.85 : 27,958.52 = 15,521.93 : x
  2. Step 2: Convert to fraction form
    20,245.85/27,958.52 = 15,521.93/x
  3. Step 3: Cross multiply
    20,245.85x = 27,958.52 × 15,521.93
  4. Step 4: Simplify right side
    20,245.85x = 433,970,106.89
  5. Step 5: Solve for x
    x = 433,970,106.89/20,245.85
  6. Step 6: Final answer
    x = 21,435.02

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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.