Home / 13,279.96-19,920.99-3,419.35

Finding the Fourth Proportional to 13,279.96, 19,920.99 and 3,419.35

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Solution

The fourth proportional to 13,279.96, 19,920.99 and 3,419.35 is: 5,129.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,279.96 : 19,920.99 = 3,419.35 : x
  2. Step 2: Convert to fraction form
    13,279.96/19,920.99 = 3,419.35/x
  3. Step 3: Cross multiply
    13,279.96x = 19,920.99 × 3,419.35
  4. Step 4: Simplify right side
    13,279.96x = 68,116,837.16
  5. Step 5: Solve for x
    x = 68,116,837.16/13,279.96
  6. Step 6: Final answer
    x = 5,129.30

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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.