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Finding the Fourth Proportional to 19,361.88, 29,008.80 and 13,806.92

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Solution

The fourth proportional to 19,361.88, 29,008.80 and 13,806.92 is: 20,686.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,361.88 : 29,008.80 = 13,806.92 : x
  2. Step 2: Convert to fraction form
    19,361.88/29,008.80 = 13,806.92/x
  3. Step 3: Cross multiply
    19,361.88x = 29,008.80 × 13,806.92
  4. Step 4: Simplify right side
    19,361.88x = 400,522,180.90
  5. Step 5: Solve for x
    x = 400,522,180.90/19,361.88
  6. Step 6: Final answer
    x = 20,686.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.