Home / 15,419.82-21,279.50-8,346.39

Finding the Fourth Proportional to 15,419.82, 21,279.50 and 8,346.39

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Solution

The fourth proportional to 15,419.82, 21,279.50 and 8,346.39 is: 11,518.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,419.82 : 21,279.50 = 8,346.39 : x
  2. Step 2: Convert to fraction form
    15,419.82/21,279.50 = 8,346.39/x
  3. Step 3: Cross multiply
    15,419.82x = 21,279.50 × 8,346.39
  4. Step 4: Simplify right side
    15,419.82x = 177,606,964.27
  5. Step 5: Solve for x
    x = 177,606,964.27/15,419.82
  6. Step 6: Final answer
    x = 11,518.10

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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.