Home / 21,963.11-30,309.04-11,891.55

Finding the Fourth Proportional to 21,963.11, 30,309.04 and 11,891.55

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Solution

The fourth proportional to 21,963.11, 30,309.04 and 11,891.55 is: 16,410.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,963.11 : 30,309.04 = 11,891.55 : x
  2. Step 2: Convert to fraction form
    21,963.11/30,309.04 = 11,891.55/x
  3. Step 3: Cross multiply
    21,963.11x = 30,309.04 × 11,891.55
  4. Step 4: Simplify right side
    21,963.11x = 360,421,434.88
  5. Step 5: Solve for x
    x = 360,421,434.88/21,963.11
  6. Step 6: Final answer
    x = 16,410.31

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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.