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Finding the Fourth Proportional to 8,607.84, 12,892.32 and 5,487.84

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Solution

The fourth proportional to 8,607.84, 12,892.32 and 5,487.84 is: 8,219.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,607.84 : 12,892.32 = 5,487.84 : x
  2. Step 2: Convert to fraction form
    8,607.84/12,892.32 = 5,487.84/x
  3. Step 3: Cross multiply
    8,607.84x = 12,892.32 × 5,487.84
  4. Step 4: Simplify right side
    8,607.84x = 70,750,989.39
  5. Step 5: Solve for x
    x = 70,750,989.39/8,607.84
  6. Step 6: Final answer
    x = 8,219.37

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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.