Home / 13,979.96-20,960.90-7,409.24

Finding the Fourth Proportional to 13,979.96, 20,960.90 and 7,409.24

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Solution

The fourth proportional to 13,979.96, 20,960.90 and 7,409.24 is: 11,109.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.96 : 20,960.90 = 7,409.24 : x
  2. Step 2: Convert to fraction form
    13,979.96/20,960.90 = 7,409.24/x
  3. Step 3: Cross multiply
    13,979.96x = 20,960.90 × 7,409.24
  4. Step 4: Simplify right side
    13,979.96x = 155,304,338.72
  5. Step 5: Solve for x
    x = 155,304,338.72/13,979.96
  6. Step 6: Final answer
    x = 11,109.07

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1.5x scale

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.