Home / 13,623.12-20,408.76-7,761.96

Finding the Fourth Proportional to 13,623.12, 20,408.76 and 7,761.96

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Solution

The fourth proportional to 13,623.12, 20,408.76 and 7,761.96 is: 11,628.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,623.12 : 20,408.76 = 7,761.96 : x
  2. Step 2: Convert to fraction form
    13,623.12/20,408.76 = 7,761.96/x
  3. Step 3: Cross multiply
    13,623.12x = 20,408.76 × 7,761.96
  4. Step 4: Simplify right side
    13,623.12x = 158,411,978.77
  5. Step 5: Solve for x
    x = 158,411,978.77/13,623.12
  6. Step 6: Final answer
    x = 11,628.17

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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.