Home / 11,431.10-15,775.65-6,395.90

Finding the Fourth Proportional to 11,431.10, 15,775.65 and 6,395.90

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Solution

The fourth proportional to 11,431.10, 15,775.65 and 6,395.90 is: 8,826.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,431.10 : 15,775.65 = 6,395.90 : x
  2. Step 2: Convert to fraction form
    11,431.10/15,775.65 = 6,395.90/x
  3. Step 3: Cross multiply
    11,431.10x = 15,775.65 × 6,395.90
  4. Step 4: Simplify right side
    11,431.10x = 100,899,479.84
  5. Step 5: Solve for x
    x = 100,899,479.84/11,431.10
  6. Step 6: Final answer
    x = 8,826.75

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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.