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Finding the Fourth Proportional to 21,952.92, 30,293.11 and 12,998.91

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Solution

The fourth proportional to 21,952.92, 30,293.11 and 12,998.91 is: 17,937.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,952.92 : 30,293.11 = 12,998.91 : x
  2. Step 2: Convert to fraction form
    21,952.92/30,293.11 = 12,998.91/x
  3. Step 3: Cross multiply
    21,952.92x = 30,293.11 × 12,998.91
  4. Step 4: Simplify right side
    21,952.92x = 393,777,345.52
  5. Step 5: Solve for x
    x = 393,777,345.52/21,952.92
  6. Step 6: Final answer
    x = 17,937.36

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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.