Home / 21,979-30,335.97-15,614.83

Finding the Fourth Proportional to 21,979, 30,335.97 and 15,614.83

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Solution

The fourth proportional to 21,979, 30,335.97 and 15,614.83 is: 21,551.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,979 : 30,335.97 = 15,614.83 : x
  2. Step 2: Convert to fraction form
    21,979/30,335.97 = 15,614.83/x
  3. Step 3: Cross multiply
    21,979x = 30,335.97 × 15,614.83
  4. Step 4: Simplify right side
    21,979x = 473,691,014.44
  5. Step 5: Solve for x
    x = 473,691,014.44/21,979
  6. Step 6: Final answer
    x = 21,551.98

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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.