Home / 21,086.52-31,770.32-19,087.62

Finding the Fourth Proportional to 21,086.52, 31,770.32 and 19,087.62

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Solution

The fourth proportional to 21,086.52, 31,770.32 and 19,087.62 is: 28,758.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,086.52 : 31,770.32 = 19,087.62 : x
  2. Step 2: Convert to fraction form
    21,086.52/31,770.32 = 19,087.62/x
  3. Step 3: Cross multiply
    21,086.52x = 31,770.32 × 19,087.62
  4. Step 4: Simplify right side
    21,086.52x = 606,419,795.44
  5. Step 5: Solve for x
    x = 606,419,795.44/21,086.52
  6. Step 6: Final answer
    x = 28,758.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.