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Finding the Fourth Proportional to 21,937.58, 30,273.86 and 12,379.49

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Solution

The fourth proportional to 21,937.58, 30,273.86 and 12,379.49 is: 17,083.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,937.58 : 30,273.86 = 12,379.49 : x
  2. Step 2: Convert to fraction form
    21,937.58/30,273.86 = 12,379.49/x
  3. Step 3: Cross multiply
    21,937.58x = 30,273.86 × 12,379.49
  4. Step 4: Simplify right side
    21,937.58x = 374,775,053.76
  5. Step 5: Solve for x
    x = 374,775,053.76/21,937.58
  6. Step 6: Final answer
    x = 17,083.70

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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.