Home / 31,108.75-42,930.08-19,930.75

Finding the Fourth Proportional to 31,108.75, 42,930.08 and 19,930.75

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Solution

The fourth proportional to 31,108.75, 42,930.08 and 19,930.75 is: 27,504.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,108.75 : 42,930.08 = 19,930.75 : x
  2. Step 2: Convert to fraction form
    31,108.75/42,930.08 = 19,930.75/x
  3. Step 3: Cross multiply
    31,108.75x = 42,930.08 × 19,930.75
  4. Step 4: Simplify right side
    31,108.75x = 855,628,691.96
  5. Step 5: Solve for x
    x = 855,628,691.96/31,108.75
  6. Step 6: Final answer
    x = 27,504.44

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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.