Home / 15,404.15-21,257.96-8,689.91

Finding the Fourth Proportional to 15,404.15, 21,257.96 and 8,689.91

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Solution

The fourth proportional to 15,404.15, 21,257.96 and 8,689.91 is: 11,992.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,404.15 : 21,257.96 = 8,689.91 : x
  2. Step 2: Convert to fraction form
    15,404.15/21,257.96 = 8,689.91/x
  3. Step 3: Cross multiply
    15,404.15x = 21,257.96 × 8,689.91
  4. Step 4: Simplify right side
    15,404.15x = 184,729,609.44
  5. Step 5: Solve for x
    x = 184,729,609.44/15,404.15
  6. Step 6: Final answer
    x = 11,992.20

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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.