Home / 21,869.44-30,179.55-12,309.28

Finding the Fourth Proportional to 21,869.44, 30,179.55 and 12,309.28

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Solution

The fourth proportional to 21,869.44, 30,179.55 and 12,309.28 is: 16,986.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,869.44 : 30,179.55 = 12,309.28 : x
  2. Step 2: Convert to fraction form
    21,869.44/30,179.55 = 12,309.28/x
  3. Step 3: Cross multiply
    21,869.44x = 30,179.55 × 12,309.28
  4. Step 4: Simplify right side
    21,869.44x = 371,488,531.22
  5. Step 5: Solve for x
    x = 371,488,531.22/21,869.44
  6. Step 6: Final answer
    x = 16,986.65

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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.