Home / 21,576.93-29,778.89-13,080.44

Finding the Fourth Proportional to 21,576.93, 29,778.89 and 13,080.44

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Solution

The fourth proportional to 21,576.93, 29,778.89 and 13,080.44 is: 18,052.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,576.93 : 29,778.89 = 13,080.44 : x
  2. Step 2: Convert to fraction form
    21,576.93/29,778.89 = 13,080.44/x
  3. Step 3: Cross multiply
    21,576.93x = 29,778.89 × 13,080.44
  4. Step 4: Simplify right side
    21,576.93x = 389,520,769.61
  5. Step 5: Solve for x
    x = 389,520,769.61/21,576.93
  6. Step 6: Final answer
    x = 18,052.65

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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.