Home / 15,431.13-21,279.03-13,200.39

Finding the Fourth Proportional to 15,431.13, 21,279.03 and 13,200.39

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Solution

The fourth proportional to 15,431.13, 21,279.03 and 13,200.39 is: 18,202.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,431.13 : 21,279.03 = 13,200.39 : x
  2. Step 2: Convert to fraction form
    15,431.13/21,279.03 = 13,200.39/x
  3. Step 3: Cross multiply
    15,431.13x = 21,279.03 × 13,200.39
  4. Step 4: Simplify right side
    15,431.13x = 280,891,494.82
  5. Step 5: Solve for x
    x = 280,891,494.82/15,431.13
  6. Step 6: Final answer
    x = 18,202.91

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1.5x scale

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.