Home / 21,772.77-30,049.19-12,821.10

Finding the Fourth Proportional to 21,772.77, 30,049.19 and 12,821.10

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Solution

The fourth proportional to 21,772.77, 30,049.19 and 12,821.10 is: 17,694.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,772.77 : 30,049.19 = 12,821.10 : x
  2. Step 2: Convert to fraction form
    21,772.77/30,049.19 = 12,821.10/x
  3. Step 3: Cross multiply
    21,772.77x = 30,049.19 × 12,821.10
  4. Step 4: Simplify right side
    21,772.77x = 385,263,605.80
  5. Step 5: Solve for x
    x = 385,263,605.80/21,772.77
  6. Step 6: Final answer
    x = 17,694.74

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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.