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Finding the Fourth Proportional to 11,120.40, 16,679.52 and 2,912.40

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Solution

The fourth proportional to 11,120.40, 16,679.52 and 2,912.40 is: 4,368.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,120.40 : 16,679.52 = 2,912.40 : x
  2. Step 2: Convert to fraction form
    11,120.40/16,679.52 = 2,912.40/x
  3. Step 3: Cross multiply
    11,120.40x = 16,679.52 × 2,912.40
  4. Step 4: Simplify right side
    11,120.40x = 48,577,434.05
  5. Step 5: Solve for x
    x = 48,577,434.05/11,120.40
  6. Step 6: Final answer
    x = 4,368.32

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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.