Home / 20,939.12-28,886.15-12,441.50

Finding the Fourth Proportional to 20,939.12, 28,886.15 and 12,441.50

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Solution

The fourth proportional to 20,939.12, 28,886.15 and 12,441.50 is: 17,163.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.12 : 28,886.15 = 12,441.50 : x
  2. Step 2: Convert to fraction form
    20,939.12/28,886.15 = 12,441.50/x
  3. Step 3: Cross multiply
    20,939.12x = 28,886.15 × 12,441.50
  4. Step 4: Simplify right side
    20,939.12x = 359,387,138.54
  5. Step 5: Solve for x
    x = 359,387,138.54/20,939.12
  6. Step 6: Final answer
    x = 17,163.43

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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.