Home / 21,425.44-29,557.20-13,874.21

Finding the Fourth Proportional to 21,425.44, 29,557.20 and 13,874.21

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Solution

The fourth proportional to 21,425.44, 29,557.20 and 13,874.21 is: 19,139.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,425.44 : 29,557.20 = 13,874.21 : x
  2. Step 2: Convert to fraction form
    21,425.44/29,557.20 = 13,874.21/x
  3. Step 3: Cross multiply
    21,425.44x = 29,557.20 × 13,874.21
  4. Step 4: Simplify right side
    21,425.44x = 410,082,799.81
  5. Step 5: Solve for x
    x = 410,082,799.81/21,425.44
  6. Step 6: Final answer
    x = 19,139.99

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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.