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Finding the Fourth Proportional to 8,876.60, 13,289.30 and 5,420.60

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Solution

The fourth proportional to 8,876.60, 13,289.30 and 5,420.60 is: 8,115.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,876.60 : 13,289.30 = 5,420.60 : x
  2. Step 2: Convert to fraction form
    8,876.60/13,289.30 = 5,420.60/x
  3. Step 3: Cross multiply
    8,876.60x = 13,289.30 × 5,420.60
  4. Step 4: Simplify right side
    8,876.60x = 72,035,979.58
  5. Step 5: Solve for x
    x = 72,035,979.58/8,876.60
  6. Step 6: Final answer
    x = 8,115.27

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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.