Home / 21,972.90-30,322.44-11,901.12

Finding the Fourth Proportional to 21,972.90, 30,322.44 and 11,901.12

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Solution

The fourth proportional to 21,972.90, 30,322.44 and 11,901.12 is: 16,423.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,972.90 : 30,322.44 = 11,901.12 : x
  2. Step 2: Convert to fraction form
    21,972.90/30,322.44 = 11,901.12/x
  3. Step 3: Cross multiply
    21,972.90x = 30,322.44 × 11,901.12
  4. Step 4: Simplify right side
    21,972.90x = 360,870,997.13
  5. Step 5: Solve for x
    x = 360,870,997.13/21,972.90
  6. Step 6: Final answer
    x = 16,423.46

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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.