Home / 21,972.27-30,322.11-11,901.12

Finding the Fourth Proportional to 21,972.27, 30,322.11 and 11,901.12

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Solution

The fourth proportional to 21,972.27, 30,322.11 and 11,901.12 is: 16,423.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,972.27 : 30,322.11 = 11,901.12 : x
  2. Step 2: Convert to fraction form
    21,972.27/30,322.11 = 11,901.12/x
  3. Step 3: Cross multiply
    21,972.27x = 30,322.11 × 11,901.12
  4. Step 4: Simplify right side
    21,972.27x = 360,867,069.76
  5. Step 5: Solve for x
    x = 360,867,069.76/21,972.27
  6. Step 6: Final answer
    x = 16,423.75

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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.