Home / 21,378.07-29,498.57-12,179.71

Finding the Fourth Proportional to 21,378.07, 29,498.57 and 12,179.71

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Solution

The fourth proportional to 21,378.07, 29,498.57 and 12,179.71 is: 16,806.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,378.07 : 29,498.57 = 12,179.71 : x
  2. Step 2: Convert to fraction form
    21,378.07/29,498.57 = 12,179.71/x
  3. Step 3: Cross multiply
    21,378.07x = 29,498.57 × 12,179.71
  4. Step 4: Simplify right side
    21,378.07x = 359,283,910.97
  5. Step 5: Solve for x
    x = 359,283,910.97/21,378.07
  6. Step 6: Final answer
    x = 16,806.19

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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.