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Finding the Fourth Proportional to 8,157.60, 12,169.80 and 7,005.60

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Solution

The fourth proportional to 8,157.60, 12,169.80 and 7,005.60 is: 10,451.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,157.60 : 12,169.80 = 7,005.60 : x
  2. Step 2: Convert to fraction form
    8,157.60/12,169.80 = 7,005.60/x
  3. Step 3: Cross multiply
    8,157.60x = 12,169.80 × 7,005.60
  4. Step 4: Simplify right side
    8,157.60x = 85,256,750.88
  5. Step 5: Solve for x
    x = 85,256,750.88/8,157.60
  6. Step 6: Final answer
    x = 10,451.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.