Home / 15,678.09-21,635.82-8,604.90

Finding the Fourth Proportional to 15,678.09, 21,635.82 and 8,604.90

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Solution

The fourth proportional to 15,678.09, 21,635.82 and 8,604.90 is: 11,874.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,678.09 : 21,635.82 = 8,604.90 : x
  2. Step 2: Convert to fraction form
    15,678.09/21,635.82 = 8,604.90/x
  3. Step 3: Cross multiply
    15,678.09x = 21,635.82 × 8,604.90
  4. Step 4: Simplify right side
    15,678.09x = 186,174,067.52
  5. Step 5: Solve for x
    x = 186,174,067.52/15,678.09
  6. Step 6: Final answer
    x = 11,874.79

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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.