Home / 21,201.08-31,800.80-8,717.64

Finding the Fourth Proportional to 21,201.08, 31,800.80 and 8,717.64

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Solution

The fourth proportional to 21,201.08, 31,800.80 and 8,717.64 is: 13,076.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,201.08 : 31,800.80 = 8,717.64 : x
  2. Step 2: Convert to fraction form
    21,201.08/31,800.80 = 8,717.64/x
  3. Step 3: Cross multiply
    21,201.08x = 31,800.80 × 8,717.64
  4. Step 4: Simplify right side
    21,201.08x = 277,227,926.11
  5. Step 5: Solve for x
    x = 277,227,926.11/21,201.08
  6. Step 6: Final answer
    x = 13,076.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.