Home / 13,187.76-19,764.18-7,905.72

Finding the Fourth Proportional to 13,187.76, 19,764.18 and 7,905.72

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Solution

The fourth proportional to 13,187.76, 19,764.18 and 7,905.72 is: 11,848.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,187.76 : 19,764.18 = 7,905.72 : x
  2. Step 2: Convert to fraction form
    13,187.76/19,764.18 = 7,905.72/x
  3. Step 3: Cross multiply
    13,187.76x = 19,764.18 × 7,905.72
  4. Step 4: Simplify right side
    13,187.76x = 156,250,073.11
  5. Step 5: Solve for x
    x = 156,250,073.11/13,187.76
  6. Step 6: Final answer
    x = 11,848.11

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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.