Home / 13,606.32-20,399.88-5,279.40

Finding the Fourth Proportional to 13,606.32, 20,399.88 and 5,279.40

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Solution

The fourth proportional to 13,606.32, 20,399.88 and 5,279.40 is: 7,915.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,606.32 : 20,399.88 = 5,279.40 : x
  2. Step 2: Convert to fraction form
    13,606.32/20,399.88 = 5,279.40/x
  3. Step 3: Cross multiply
    13,606.32x = 20,399.88 × 5,279.40
  4. Step 4: Simplify right side
    13,606.32x = 107,699,126.47
  5. Step 5: Solve for x
    x = 107,699,126.47/13,606.32
  6. Step 6: Final answer
    x = 7,915.38

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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.