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Finding the Fourth Proportional to 8,673.60, 13,010.40 and 8,587.20

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Solution

The fourth proportional to 8,673.60, 13,010.40 and 8,587.20 is: 12,880.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,673.60 : 13,010.40 = 8,587.20 : x
  2. Step 2: Convert to fraction form
    8,673.60/13,010.40 = 8,587.20/x
  3. Step 3: Cross multiply
    8,673.60x = 13,010.40 × 8,587.20
  4. Step 4: Simplify right side
    8,673.60x = 111,722,906.88
  5. Step 5: Solve for x
    x = 111,722,906.88/8,673.60
  6. Step 6: Final answer
    x = 12,880.80

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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.