Home / 31,691.60-43,720.68-19,109.36

Finding the Fourth Proportional to 31,691.60, 43,720.68 and 19,109.36

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Solution

The fourth proportional to 31,691.60, 43,720.68 and 19,109.36 is: 26,362.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,691.60 : 43,720.68 = 19,109.36 : x
  2. Step 2: Convert to fraction form
    31,691.60/43,720.68 = 19,109.36/x
  3. Step 3: Cross multiply
    31,691.60x = 43,720.68 × 19,109.36
  4. Step 4: Simplify right side
    31,691.60x = 835,474,213.56
  5. Step 5: Solve for x
    x = 835,474,213.56/31,691.60
  6. Step 6: Final answer
    x = 26,362.64

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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.