Home / 31,720.48-43,766.16-19,789.60

Finding the Fourth Proportional to 31,720.48, 43,766.16 and 19,789.60

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Solution

The fourth proportional to 31,720.48, 43,766.16 and 19,789.60 is: 27,304.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,720.48 : 43,766.16 = 19,789.60 : x
  2. Step 2: Convert to fraction form
    31,720.48/43,766.16 = 19,789.60/x
  3. Step 3: Cross multiply
    31,720.48x = 43,766.16 × 19,789.60
  4. Step 4: Simplify right side
    31,720.48x = 866,114,799.94
  5. Step 5: Solve for x
    x = 866,114,799.94/31,720.48
  6. Step 6: Final answer
    x = 27,304.59

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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.