Home / 21,177.96-31,612.31-19,636.14

Finding the Fourth Proportional to 21,177.96, 31,612.31 and 19,636.14

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Solution

The fourth proportional to 21,177.96, 31,612.31 and 19,636.14 is: 29,310.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,177.96 : 31,612.31 = 19,636.14 : x
  2. Step 2: Convert to fraction form
    21,177.96/31,612.31 = 19,636.14/x
  3. Step 3: Cross multiply
    21,177.96x = 31,612.31 × 19,636.14
  4. Step 4: Simplify right side
    21,177.96x = 620,743,646.70
  5. Step 5: Solve for x
    x = 620,743,646.70/21,177.96
  6. Step 6: Final answer
    x = 29,310.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.