Home / 31,344.79-43,231.66-21,784.56

Finding the Fourth Proportional to 31,344.79, 43,231.66 and 21,784.56

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Solution

The fourth proportional to 31,344.79, 43,231.66 and 21,784.56 is: 30,045.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,344.79 : 43,231.66 = 21,784.56 : x
  2. Step 2: Convert to fraction form
    31,344.79/43,231.66 = 21,784.56/x
  3. Step 3: Cross multiply
    31,344.79x = 43,231.66 × 21,784.56
  4. Step 4: Simplify right side
    31,344.79x = 941,782,691.17
  5. Step 5: Solve for x
    x = 941,782,691.17/31,344.79
  6. Step 6: Final answer
    x = 30,045.91

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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.