Home / 21,191.22-29,245.08-12,810.42

Finding the Fourth Proportional to 21,191.22, 29,245.08 and 12,810.42

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Solution

The fourth proportional to 21,191.22, 29,245.08 and 12,810.42 is: 17,679.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,191.22 : 29,245.08 = 12,810.42 : x
  2. Step 2: Convert to fraction form
    21,191.22/29,245.08 = 12,810.42/x
  3. Step 3: Cross multiply
    21,191.22x = 29,245.08 × 12,810.42
  4. Step 4: Simplify right side
    21,191.22x = 374,641,757.73
  5. Step 5: Solve for x
    x = 374,641,757.73/21,191.22
  6. Step 6: Final answer
    x = 17,679.10

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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.