Home / 21,960.05-30,304.91-11,888.60

Finding the Fourth Proportional to 21,960.05, 30,304.91 and 11,888.60

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Solution

The fourth proportional to 21,960.05, 30,304.91 and 11,888.60 is: 16,406.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,960.05 : 30,304.91 = 11,888.60 : x
  2. Step 2: Convert to fraction form
    21,960.05/30,304.91 = 11,888.60/x
  3. Step 3: Cross multiply
    21,960.05x = 30,304.91 × 11,888.60
  4. Step 4: Simplify right side
    21,960.05x = 360,282,831.22
  5. Step 5: Solve for x
    x = 360,282,831.22/21,960.05
  6. Step 6: Final answer
    x = 16,406.29

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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.