Home / 21,220.08-31,829.28-8,736.66

Finding the Fourth Proportional to 21,220.08, 31,829.28 and 8,736.66

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Solution

The fourth proportional to 21,220.08, 31,829.28 and 8,736.66 is: 13,104.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,220.08 : 31,829.28 = 8,736.66 : x
  2. Step 2: Convert to fraction form
    21,220.08/31,829.28 = 8,736.66/x
  3. Step 3: Cross multiply
    21,220.08x = 31,829.28 × 8,736.66
  4. Step 4: Simplify right side
    21,220.08x = 278,081,597.40
  5. Step 5: Solve for x
    x = 278,081,597.40/21,220.08
  6. Step 6: Final answer
    x = 13,104.64

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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.