Home / 11,115.72-15,341.02-6,399.90

Finding the Fourth Proportional to 11,115.72, 15,341.02 and 6,399.90

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Solution

The fourth proportional to 11,115.72, 15,341.02 and 6,399.90 is: 8,832.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,115.72 : 15,341.02 = 6,399.90 : x
  2. Step 2: Convert to fraction form
    11,115.72/15,341.02 = 6,399.90/x
  3. Step 3: Cross multiply
    11,115.72x = 15,341.02 × 6,399.90
  4. Step 4: Simplify right side
    11,115.72x = 98,180,993.90
  5. Step 5: Solve for x
    x = 98,180,993.90/11,115.72
  6. Step 6: Final answer
    x = 8,832.63

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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.