Home / 20,886.75-28,825.20-12,933.54

Finding the Fourth Proportional to 20,886.75, 28,825.20 and 12,933.54

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Solution

The fourth proportional to 20,886.75, 28,825.20 and 12,933.54 is: 17,849.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,886.75 : 28,825.20 = 12,933.54 : x
  2. Step 2: Convert to fraction form
    20,886.75/28,825.20 = 12,933.54/x
  3. Step 3: Cross multiply
    20,886.75x = 28,825.20 × 12,933.54
  4. Step 4: Simplify right side
    20,886.75x = 372,811,877.21
  5. Step 5: Solve for x
    x = 372,811,877.21/20,886.75
  6. Step 6: Final answer
    x = 17,849.20

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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.