Home / 21,896.28-30,167.10-20,418.84

Finding the Fourth Proportional to 21,896.28, 30,167.10 and 20,418.84

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Solution

The fourth proportional to 21,896.28, 30,167.10 and 20,418.84 is: 28,131.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,896.28 : 30,167.10 = 20,418.84 : x
  2. Step 2: Convert to fraction form
    21,896.28/30,167.10 = 20,418.84/x
  3. Step 3: Cross multiply
    21,896.28x = 30,167.10 × 20,418.84
  4. Step 4: Simplify right side
    21,896.28x = 615,977,188.16
  5. Step 5: Solve for x
    x = 615,977,188.16/21,896.28
  6. Step 6: Final answer
    x = 28,131.59

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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.