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Finding the Fourth Proportional to 8,590.97, 12,887.99 and 4,429.86

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Solution

The fourth proportional to 8,590.97, 12,887.99 and 4,429.86 is: 6,645.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,590.97 : 12,887.99 = 4,429.86 : x
  2. Step 2: Convert to fraction form
    8,590.97/12,887.99 = 4,429.86/x
  3. Step 3: Cross multiply
    8,590.97x = 12,887.99 × 4,429.86
  4. Step 4: Simplify right side
    8,590.97x = 57,092,002.46
  5. Step 5: Solve for x
    x = 57,092,002.46/8,590.97
  6. Step 6: Final answer
    x = 6,645.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.