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Finding the Fourth Proportional to 10,662.84, 15,989.40 and 5,472.36

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Solution

The fourth proportional to 10,662.84, 15,989.40 and 5,472.36 is: 8,206.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,662.84 : 15,989.40 = 5,472.36 : x
  2. Step 2: Convert to fraction form
    10,662.84/15,989.40 = 5,472.36/x
  3. Step 3: Cross multiply
    10,662.84x = 15,989.40 × 5,472.36
  4. Step 4: Simplify right side
    10,662.84x = 87,499,752.98
  5. Step 5: Solve for x
    x = 87,499,752.98/10,662.84
  6. Step 6: Final answer
    x = 8,206.05

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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.