Home / 15,764.95-21,755.78-8,691.63

Finding the Fourth Proportional to 15,764.95, 21,755.78 and 8,691.63

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Solution

The fourth proportional to 15,764.95, 21,755.78 and 8,691.63 is: 11,994.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,764.95 : 21,755.78 = 8,691.63 : x
  2. Step 2: Convert to fraction form
    15,764.95/21,755.78 = 8,691.63/x
  3. Step 3: Cross multiply
    15,764.95x = 21,755.78 × 8,691.63
  4. Step 4: Simplify right side
    15,764.95x = 189,093,097.67
  5. Step 5: Solve for x
    x = 189,093,097.67/15,764.95
  6. Step 6: Final answer
    x = 11,994.52

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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.