Home / 15,404.12-21,257.62-8,689.70

Finding the Fourth Proportional to 15,404.12, 21,257.62 and 8,689.70

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Solution

The fourth proportional to 15,404.12, 21,257.62 and 8,689.70 is: 11,991.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,404.12 : 21,257.62 = 8,689.70 : x
  2. Step 2: Convert to fraction form
    15,404.12/21,257.62 = 8,689.70/x
  3. Step 3: Cross multiply
    15,404.12x = 21,257.62 × 8,689.70
  4. Step 4: Simplify right side
    15,404.12x = 184,722,340.51
  5. Step 5: Solve for x
    x = 184,722,340.51/15,404.12
  6. Step 6: Final answer
    x = 11,991.75

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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.