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Finding the Fourth Proportional to 21,976.66, 30,327.16 and 12,901.88

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Solution

The fourth proportional to 21,976.66, 30,327.16 and 12,901.88 is: 17,804.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,976.66 : 30,327.16 = 12,901.88 : x
  2. Step 2: Convert to fraction form
    21,976.66/30,327.16 = 12,901.88/x
  3. Step 3: Cross multiply
    21,976.66x = 30,327.16 × 12,901.88
  4. Step 4: Simplify right side
    21,976.66x = 391,277,379.06
  5. Step 5: Solve for x
    x = 391,277,379.06/21,976.66
  6. Step 6: Final answer
    x = 17,804.22

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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.