Home / 21,161.33-31,710.70-19,977.92

Finding the Fourth Proportional to 21,161.33, 31,710.70 and 19,977.92

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Solution

The fourth proportional to 21,161.33, 31,710.70 and 19,977.92 is: 29,937.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,161.33 : 31,710.70 = 19,977.92 : x
  2. Step 2: Convert to fraction form
    21,161.33/31,710.70 = 19,977.92/x
  3. Step 3: Cross multiply
    21,161.33x = 31,710.70 × 19,977.92
  4. Step 4: Simplify right side
    21,161.33x = 633,513,569.30
  5. Step 5: Solve for x
    x = 633,513,569.30/21,161.33
  6. Step 6: Final answer
    x = 29,937.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.