Home / 31,321-43,245.66-20,162.44

Finding the Fourth Proportional to 31,321, 43,245.66 and 20,162.44

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Solution

The fourth proportional to 31,321, 43,245.66 and 20,162.44 is: 27,838.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,321 : 43,245.66 = 20,162.44 : x
  2. Step 2: Convert to fraction form
    31,321/43,245.66 = 20,162.44/x
  3. Step 3: Cross multiply
    31,321x = 43,245.66 × 20,162.44
  4. Step 4: Simplify right side
    31,321x = 871,938,025.01
  5. Step 5: Solve for x
    x = 871,938,025.01/31,321
  6. Step 6: Final answer
    x = 27,838.77

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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.