Home / 31,440.21-43,405.41-20,844.18

Finding the Fourth Proportional to 31,440.21, 43,405.41 and 20,844.18

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Solution

The fourth proportional to 31,440.21, 43,405.41 and 20,844.18 is: 28,776.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,440.21 : 43,405.41 = 20,844.18 : x
  2. Step 2: Convert to fraction form
    31,440.21/43,405.41 = 20,844.18/x
  3. Step 3: Cross multiply
    31,440.21x = 43,405.41 × 20,844.18
  4. Step 4: Simplify right side
    31,440.21x = 904,750,179.01
  5. Step 5: Solve for x
    x = 904,750,179.01/31,440.21
  6. Step 6: Final answer
    x = 28,776.85

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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.