Home / 20,966.89-28,927.42-11,891.22

Finding the Fourth Proportional to 20,966.89, 28,927.42 and 11,891.22

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Solution

The fourth proportional to 20,966.89, 28,927.42 and 11,891.22 is: 16,405.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,966.89 : 28,927.42 = 11,891.22 : x
  2. Step 2: Convert to fraction form
    20,966.89/28,927.42 = 11,891.22/x
  3. Step 3: Cross multiply
    20,966.89x = 28,927.42 × 11,891.22
  4. Step 4: Simplify right side
    20,966.89x = 343,982,315.25
  5. Step 5: Solve for x
    x = 343,982,315.25/20,966.89
  6. Step 6: Final answer
    x = 16,405.98

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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.