Home / 21,979.53-30,331.76-11,908.04

Finding the Fourth Proportional to 21,979.53, 30,331.76 and 11,908.04

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Solution

The fourth proportional to 21,979.53, 30,331.76 and 11,908.04 is: 16,433.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,979.53 : 30,331.76 = 11,908.04 : x
  2. Step 2: Convert to fraction form
    21,979.53/30,331.76 = 11,908.04/x
  3. Step 3: Cross multiply
    21,979.53x = 30,331.76 × 11,908.04
  4. Step 4: Simplify right side
    21,979.53x = 361,191,675.98
  5. Step 5: Solve for x
    x = 361,191,675.98/21,979.53
  6. Step 6: Final answer
    x = 16,433.10

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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.