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Finding the Fourth Proportional to 8,590.84, 12,887.60 and 3,660.50

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Solution

The fourth proportional to 8,590.84, 12,887.60 and 3,660.50 is: 5,491.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,590.84 : 12,887.60 = 3,660.50 : x
  2. Step 2: Convert to fraction form
    8,590.84/12,887.60 = 3,660.50/x
  3. Step 3: Cross multiply
    8,590.84x = 12,887.60 × 3,660.50
  4. Step 4: Simplify right side
    8,590.84x = 47,175,059.80
  5. Step 5: Solve for x
    x = 47,175,059.80/8,590.84
  6. Step 6: Final answer
    x = 5,491.32

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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.