Home / 21,089.88-29,106.36-13,438.62

Finding the Fourth Proportional to 21,089.88, 29,106.36 and 13,438.62

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Solution

The fourth proportional to 21,089.88, 29,106.36 and 13,438.62 is: 18,546.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,089.88 : 29,106.36 = 13,438.62 : x
  2. Step 2: Convert to fraction form
    21,089.88/29,106.36 = 13,438.62/x
  3. Step 3: Cross multiply
    21,089.88x = 29,106.36 × 13,438.62
  4. Step 4: Simplify right side
    21,089.88x = 391,149,311.62
  5. Step 5: Solve for x
    x = 391,149,311.62/21,089.88
  6. Step 6: Final answer
    x = 18,546.78

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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.