Home / 21,961.32-30,299.16-12,400.08

Finding the Fourth Proportional to 21,961.32, 30,299.16 and 12,400.08

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Solution

The fourth proportional to 21,961.32, 30,299.16 and 12,400.08 is: 17,107.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,961.32 : 30,299.16 = 12,400.08 : x
  2. Step 2: Convert to fraction form
    21,961.32/30,299.16 = 12,400.08/x
  3. Step 3: Cross multiply
    21,961.32x = 30,299.16 × 12,400.08
  4. Step 4: Simplify right side
    21,961.32x = 375,712,007.93
  5. Step 5: Solve for x
    x = 375,712,007.93/21,961.32
  6. Step 6: Final answer
    x = 17,107.90

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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.