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Finding the Fourth Proportional to 15,658.92, 21,609.48 and 8,585.39

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Solution

The fourth proportional to 15,658.92, 21,609.48 and 8,585.39 is: 11,847.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,658.92 : 21,609.48 = 8,585.39 : x
  2. Step 2: Convert to fraction form
    15,658.92/21,609.48 = 8,585.39/x
  3. Step 3: Cross multiply
    15,658.92x = 21,609.48 × 8,585.39
  4. Step 4: Simplify right side
    15,658.92x = 185,525,899.72
  5. Step 5: Solve for x
    x = 185,525,899.72/15,658.92
  6. Step 6: Final answer
    x = 11,847.94

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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.