Home / 21,339.91-29,449.10-11,908.47

Finding the Fourth Proportional to 21,339.91, 29,449.10 and 11,908.47

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Solution

The fourth proportional to 21,339.91, 29,449.10 and 11,908.47 is: 16,433.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,339.91 : 29,449.10 = 11,908.47 : x
  2. Step 2: Convert to fraction form
    21,339.91/29,449.10 = 11,908.47/x
  3. Step 3: Cross multiply
    21,339.91x = 29,449.10 × 11,908.47
  4. Step 4: Simplify right side
    21,339.91x = 350,693,723.88
  5. Step 5: Solve for x
    x = 350,693,723.88/21,339.91
  6. Step 6: Final answer
    x = 16,433.70

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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.