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Finding the Fourth Proportional to 8,768.60, 13,152.90 and 5,312.60

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Solution

The fourth proportional to 8,768.60, 13,152.90 and 5,312.60 is: 7,968.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,768.60 : 13,152.90 = 5,312.60 : x
  2. Step 2: Convert to fraction form
    8,768.60/13,152.90 = 5,312.60/x
  3. Step 3: Cross multiply
    8,768.60x = 13,152.90 × 5,312.60
  4. Step 4: Simplify right side
    8,768.60x = 69,876,096.54
  5. Step 5: Solve for x
    x = 69,876,096.54/8,768.60
  6. Step 6: Final answer
    x = 7,968.90

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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.