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Finding the Fourth Proportional to 8,990.77, 13,388.20 and 8,892.49

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Solution

The fourth proportional to 8,990.77, 13,388.20 and 8,892.49 is: 13,241.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,990.77 : 13,388.20 = 8,892.49 : x
  2. Step 2: Convert to fraction form
    8,990.77/13,388.20 = 8,892.49/x
  3. Step 3: Cross multiply
    8,990.77x = 13,388.20 × 8,892.49
  4. Step 4: Simplify right side
    8,990.77x = 119,054,434.62
  5. Step 5: Solve for x
    x = 119,054,434.62/8,990.77
  6. Step 6: Final answer
    x = 13,241.85

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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.