Home / 11,145.98-15,382.23-6,431.78

Finding the Fourth Proportional to 11,145.98, 15,382.23 and 6,431.78

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Solution

The fourth proportional to 11,145.98, 15,382.23 and 6,431.78 is: 8,876.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,145.98 : 15,382.23 = 6,431.78 : x
  2. Step 2: Convert to fraction form
    11,145.98/15,382.23 = 6,431.78/x
  3. Step 3: Cross multiply
    11,145.98x = 15,382.23 × 6,431.78
  4. Step 4: Simplify right side
    11,145.98x = 98,935,119.27
  5. Step 5: Solve for x
    x = 98,935,119.27/11,145.98
  6. Step 6: Final answer
    x = 8,876.31

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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.