Home / 13,209.72-19,776.16-10,279.14

Finding the Fourth Proportional to 13,209.72, 19,776.16 and 10,279.14

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Solution

The fourth proportional to 13,209.72, 19,776.16 and 10,279.14 is: 15,388.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,209.72 : 19,776.16 = 10,279.14 : x
  2. Step 2: Convert to fraction form
    13,209.72/19,776.16 = 10,279.14/x
  3. Step 3: Cross multiply
    13,209.72x = 19,776.16 × 10,279.14
  4. Step 4: Simplify right side
    13,209.72x = 203,281,917.30
  5. Step 5: Solve for x
    x = 203,281,917.30/13,209.72
  6. Step 6: Final answer
    x = 15,388.81

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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.