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Finding the Fourth Proportional to 11,872.32, 17,808.36 and 4,945.20

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Solution

The fourth proportional to 11,872.32, 17,808.36 and 4,945.20 is: 7,417.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,872.32 : 17,808.36 = 4,945.20 : x
  2. Step 2: Convert to fraction form
    11,872.32/17,808.36 = 4,945.20/x
  3. Step 3: Cross multiply
    11,872.32x = 17,808.36 × 4,945.20
  4. Step 4: Simplify right side
    11,872.32x = 88,065,901.87
  5. Step 5: Solve for x
    x = 88,065,901.87/11,872.32
  6. Step 6: Final answer
    x = 7,417.75

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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.