Home / 13,319.28-19,935-11,861.28

Finding the Fourth Proportional to 13,319.28, 19,935 and 11,861.28

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Solution

The fourth proportional to 13,319.28, 19,935 and 11,861.28 is: 17,752.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,319.28 : 19,935 = 11,861.28 : x
  2. Step 2: Convert to fraction form
    13,319.28/19,935 = 11,861.28/x
  3. Step 3: Cross multiply
    13,319.28x = 19,935 × 11,861.28
  4. Step 4: Simplify right side
    13,319.28x = 236,454,616.80
  5. Step 5: Solve for x
    x = 236,454,616.80/13,319.28
  6. Step 6: Final answer
    x = 17,752.81

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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.