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Finding the Fourth Proportional to 8,582.70, 12,859.65 and 4,190.70

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Solution

The fourth proportional to 8,582.70, 12,859.65 and 4,190.70 is: 6,279.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,582.70 : 12,859.65 = 4,190.70 : x
  2. Step 2: Convert to fraction form
    8,582.70/12,859.65 = 4,190.70/x
  3. Step 3: Cross multiply
    8,582.70x = 12,859.65 × 4,190.70
  4. Step 4: Simplify right side
    8,582.70x = 53,890,935.26
  5. Step 5: Solve for x
    x = 53,890,935.26/8,582.70
  6. Step 6: Final answer
    x = 6,279.02

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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.