Home / 21,189.20-29,241.20-11,757.76

Finding the Fourth Proportional to 21,189.20, 29,241.20 and 11,757.76

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Solution

The fourth proportional to 21,189.20, 29,241.20 and 11,757.76 is: 16,225.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,189.20 : 29,241.20 = 11,757.76 : x
  2. Step 2: Convert to fraction form
    21,189.20/29,241.20 = 11,757.76/x
  3. Step 3: Cross multiply
    21,189.20x = 29,241.20 × 11,757.76
  4. Step 4: Simplify right side
    21,189.20x = 343,810,968.00
  5. Step 5: Solve for x
    x = 343,810,968.00/21,189.20
  6. Step 6: Final answer
    x = 16,225.77

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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.