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Finding the Fourth Proportional to 8,765.60, 12,096.60 and 4,989.06

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Solution

The fourth proportional to 8,765.60, 12,096.60 and 4,989.06 is: 6,884.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,765.60 : 12,096.60 = 4,989.06 : x
  2. Step 2: Convert to fraction form
    8,765.60/12,096.60 = 4,989.06/x
  3. Step 3: Cross multiply
    8,765.60x = 12,096.60 × 4,989.06
  4. Step 4: Simplify right side
    8,765.60x = 60,350,577.77
  5. Step 5: Solve for x
    x = 60,350,577.77/8,765.60
  6. Step 6: Final answer
    x = 6,884.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.