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Finding the Fourth Proportional to 8,590.52, 12,891.26 and 8,520.21

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Solution

The fourth proportional to 8,590.52, 12,891.26 and 8,520.21 is: 12,785.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,590.52 : 12,891.26 = 8,520.21 : x
  2. Step 2: Convert to fraction form
    8,590.52/12,891.26 = 8,520.21/x
  3. Step 3: Cross multiply
    8,590.52x = 12,891.26 × 8,520.21
  4. Step 4: Simplify right side
    8,590.52x = 109,836,199.76
  5. Step 5: Solve for x
    x = 109,836,199.76/8,590.52
  6. Step 6: Final answer
    x = 12,785.75

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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.