Home / 15,764.63-21,755.18-8,691.50

Finding the Fourth Proportional to 15,764.63, 21,755.18 and 8,691.50

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Solution

The fourth proportional to 15,764.63, 21,755.18 and 8,691.50 is: 11,994.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,764.63 : 21,755.18 = 8,691.50 : x
  2. Step 2: Convert to fraction form
    15,764.63/21,755.18 = 8,691.50/x
  3. Step 3: Cross multiply
    15,764.63x = 21,755.18 × 8,691.50
  4. Step 4: Simplify right side
    15,764.63x = 189,085,223.09
  5. Step 5: Solve for x
    x = 189,085,223.09/15,764.63
  6. Step 6: Final answer
    x = 11,994.27

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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.