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Finding the Fourth Proportional to 15,659.07, 21,609.82 and 8,585.07

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Solution

The fourth proportional to 15,659.07, 21,609.82 and 8,585.07 is: 11,847.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,659.07 : 21,609.82 = 8,585.07 : x
  2. Step 2: Convert to fraction form
    15,659.07/21,609.82 = 8,585.07/x
  3. Step 3: Cross multiply
    15,659.07x = 21,609.82 × 8,585.07
  4. Step 4: Simplify right side
    15,659.07x = 185,521,817.39
  5. Step 5: Solve for x
    x = 185,521,817.39/15,659.07
  6. Step 6: Final answer
    x = 11,847.56

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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.