Home / 21,196.11-31,783.50-8,712.66

Finding the Fourth Proportional to 21,196.11, 31,783.50 and 8,712.66

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Solution

The fourth proportional to 21,196.11, 31,783.50 and 8,712.66 is: 13,064.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,196.11 : 31,783.50 = 8,712.66 : x
  2. Step 2: Convert to fraction form
    21,196.11/31,783.50 = 8,712.66/x
  3. Step 3: Cross multiply
    21,196.11x = 31,783.50 × 8,712.66
  4. Step 4: Simplify right side
    21,196.11x = 276,918,829.11
  5. Step 5: Solve for x
    x = 276,918,829.11/21,196.11
  6. Step 6: Final answer
    x = 13,064.61

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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.