Home / 21,908.08-30,228.32-12,949.44

Finding the Fourth Proportional to 21,908.08, 30,228.32 and 12,949.44

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Solution

The fourth proportional to 21,908.08, 30,228.32 and 12,949.44 is: 17,867.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,908.08 : 30,228.32 = 12,949.44 : x
  2. Step 2: Convert to fraction form
    21,908.08/30,228.32 = 12,949.44/x
  3. Step 3: Cross multiply
    21,908.08x = 30,228.32 × 12,949.44
  4. Step 4: Simplify right side
    21,908.08x = 391,439,816.14
  5. Step 5: Solve for x
    x = 391,439,816.14/21,908.08
  6. Step 6: Final answer
    x = 17,867.37

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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.