Home / 15,765.09-21,755.82-8,691.54

Finding the Fourth Proportional to 15,765.09, 21,755.82 and 8,691.54

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Solution

The fourth proportional to 15,765.09, 21,755.82 and 8,691.54 is: 11,994.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,765.09 : 21,755.82 = 8,691.54 : x
  2. Step 2: Convert to fraction form
    15,765.09/21,755.82 = 8,691.54/x
  3. Step 3: Cross multiply
    15,765.09x = 21,755.82 × 8,691.54
  4. Step 4: Simplify right side
    15,765.09x = 189,091,579.76
  5. Step 5: Solve for x
    x = 189,091,579.76/15,765.09
  6. Step 6: Final answer
    x = 11,994.32

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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.