Home / 13,719.14-18,939.48-8,688.62

Finding the Fourth Proportional to 13,719.14, 18,939.48 and 8,688.62

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Solution

The fourth proportional to 13,719.14, 18,939.48 and 8,688.62 is: 11,994.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,719.14 : 18,939.48 = 8,688.62 : x
  2. Step 2: Convert to fraction form
    13,719.14/18,939.48 = 8,688.62/x
  3. Step 3: Cross multiply
    13,719.14x = 18,939.48 × 8,688.62
  4. Step 4: Simplify right side
    13,719.14x = 164,557,944.72
  5. Step 5: Solve for x
    x = 164,557,944.72/13,719.14
  6. Step 6: Final answer
    x = 11,994.77

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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.