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Finding the Fourth Proportional to 11,123.20, 16,684.80 and 10,880.20

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Solution

The fourth proportional to 11,123.20, 16,684.80 and 10,880.20 is: 16,320.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,123.20 : 16,684.80 = 10,880.20 : x
  2. Step 2: Convert to fraction form
    11,123.20/16,684.80 = 10,880.20/x
  3. Step 3: Cross multiply
    11,123.20x = 16,684.80 × 10,880.20
  4. Step 4: Simplify right side
    11,123.20x = 181,533,960.96
  5. Step 5: Solve for x
    x = 181,533,960.96/11,123.20
  6. Step 6: Final answer
    x = 16,320.30

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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.