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Finding the Fourth Proportional to 21,726.92, 29,983.80 and 12,295.28

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Solution

The fourth proportional to 21,726.92, 29,983.80 and 12,295.28 is: 16,967.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,726.92 : 29,983.80 = 12,295.28 : x
  2. Step 2: Convert to fraction form
    21,726.92/29,983.80 = 12,295.28/x
  3. Step 3: Cross multiply
    21,726.92x = 29,983.80 × 12,295.28
  4. Step 4: Simplify right side
    21,726.92x = 368,659,216.46
  5. Step 5: Solve for x
    x = 368,659,216.46/21,726.92
  6. Step 6: Final answer
    x = 16,967.85

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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.