Home / 21,137.91-31,756.25-18,185.55

Finding the Fourth Proportional to 21,137.91, 31,756.25 and 18,185.55

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Solution

The fourth proportional to 21,137.91, 31,756.25 and 18,185.55 is: 27,320.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,137.91 : 31,756.25 = 18,185.55 : x
  2. Step 2: Convert to fraction form
    21,137.91/31,756.25 = 18,185.55/x
  3. Step 3: Cross multiply
    21,137.91x = 31,756.25 × 18,185.55
  4. Step 4: Simplify right side
    21,137.91x = 577,504,781.26
  5. Step 5: Solve for x
    x = 577,504,781.26/21,137.91
  6. Step 6: Final answer
    x = 27,320.81

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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.