Home / 31,668.72-43,695.36-20,188.32

Finding the Fourth Proportional to 31,668.72, 43,695.36 and 20,188.32

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Solution

The fourth proportional to 31,668.72, 43,695.36 and 20,188.32 is: 27,855.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,668.72 : 43,695.36 = 20,188.32 : x
  2. Step 2: Convert to fraction form
    31,668.72/43,695.36 = 20,188.32/x
  3. Step 3: Cross multiply
    31,668.72x = 43,695.36 × 20,188.32
  4. Step 4: Simplify right side
    31,668.72x = 882,135,910.20
  5. Step 5: Solve for x
    x = 882,135,910.20/31,668.72
  6. Step 6: Final answer
    x = 27,855.12

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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.