Home / 21,979.41-30,330.07-12,288.23

Finding the Fourth Proportional to 21,979.41, 30,330.07 and 12,288.23

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Solution

The fourth proportional to 21,979.41, 30,330.07 and 12,288.23 is: 16,956.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,979.41 : 30,330.07 = 12,288.23 : x
  2. Step 2: Convert to fraction form
    21,979.41/30,330.07 = 12,288.23/x
  3. Step 3: Cross multiply
    21,979.41x = 30,330.07 × 12,288.23
  4. Step 4: Simplify right side
    21,979.41x = 372,702,876.08
  5. Step 5: Solve for x
    x = 372,702,876.08/21,979.41
  6. Step 6: Final answer
    x = 16,956.91

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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.