Home / 11,490.56-15,855.82-6,454.40

Finding the Fourth Proportional to 11,490.56, 15,855.82 and 6,454.40

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Solution

The fourth proportional to 11,490.56, 15,855.82 and 6,454.40 is: 8,906.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,490.56 : 15,855.82 = 6,454.40 : x
  2. Step 2: Convert to fraction form
    11,490.56/15,855.82 = 6,454.40/x
  3. Step 3: Cross multiply
    11,490.56x = 15,855.82 × 6,454.40
  4. Step 4: Simplify right side
    11,490.56x = 102,339,804.61
  5. Step 5: Solve for x
    x = 102,339,804.61/11,490.56
  6. Step 6: Final answer
    x = 8,906.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.