Home / 31,287.24-43,181.34-20,563.20

Finding the Fourth Proportional to 31,287.24, 43,181.34 and 20,563.20

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Solution

The fourth proportional to 31,287.24, 43,181.34 and 20,563.20 is: 28,380.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,287.24 : 43,181.34 = 20,563.20 : x
  2. Step 2: Convert to fraction form
    31,287.24/43,181.34 = 20,563.20/x
  3. Step 3: Cross multiply
    31,287.24x = 43,181.34 × 20,563.20
  4. Step 4: Simplify right side
    31,287.24x = 887,946,530.69
  5. Step 5: Solve for x
    x = 887,946,530.69/31,287.24
  6. Step 6: Final answer
    x = 28,380.47

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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.