Home / 21,576.32-29,778.16-12,146.72

Finding the Fourth Proportional to 21,576.32, 29,778.16 and 12,146.72

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Solution

The fourth proportional to 21,576.32, 29,778.16 and 12,146.72 is: 16,764.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,576.32 : 29,778.16 = 12,146.72 : x
  2. Step 2: Convert to fraction form
    21,576.32/29,778.16 = 12,146.72/x
  3. Step 3: Cross multiply
    21,576.32x = 29,778.16 × 12,146.72
  4. Step 4: Simplify right side
    21,576.32x = 361,706,971.64
  5. Step 5: Solve for x
    x = 361,706,971.64/21,576.32
  6. Step 6: Final answer
    x = 16,764.07

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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.