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Finding the Fourth Proportional to 8,000.64, 11,905.92 and 7,689.60

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Solution

The fourth proportional to 8,000.64, 11,905.92 and 7,689.60 is: 11,443.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,000.64 : 11,905.92 = 7,689.60 : x
  2. Step 2: Convert to fraction form
    8,000.64/11,905.92 = 7,689.60/x
  3. Step 3: Cross multiply
    8,000.64x = 11,905.92 × 7,689.60
  4. Step 4: Simplify right side
    8,000.64x = 91,551,762.43
  5. Step 5: Solve for x
    x = 91,551,762.43/8,000.64
  6. Step 6: Final answer
    x = 11,443.05

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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.