Home / 21,960.11-30,304.59-11,888.47

Finding the Fourth Proportional to 21,960.11, 30,304.59 and 11,888.47

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Solution

The fourth proportional to 21,960.11, 30,304.59 and 11,888.47 is: 16,405.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,960.11 : 30,304.59 = 11,888.47 : x
  2. Step 2: Convert to fraction form
    21,960.11/30,304.59 = 11,888.47/x
  3. Step 3: Cross multiply
    21,960.11x = 30,304.59 × 11,888.47
  4. Step 4: Simplify right side
    21,960.11x = 360,275,285.97
  5. Step 5: Solve for x
    x = 360,275,285.97/21,960.11
  6. Step 6: Final answer
    x = 16,405.89

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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.