Home / 21,989.97-30,348.14-12,561.57

Finding the Fourth Proportional to 21,989.97, 30,348.14 and 12,561.57

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Solution

The fourth proportional to 21,989.97, 30,348.14 and 12,561.57 is: 17,336.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,989.97 : 30,348.14 = 12,561.57 : x
  2. Step 2: Convert to fraction form
    21,989.97/30,348.14 = 12,561.57/x
  3. Step 3: Cross multiply
    21,989.97x = 30,348.14 × 12,561.57
  4. Step 4: Simplify right side
    21,989.97x = 381,220,222.17
  5. Step 5: Solve for x
    x = 381,220,222.17/21,989.97
  6. Step 6: Final answer
    x = 17,336.10

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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.