Home / 11,115-15,338.76-6,399.24

Finding the Fourth Proportional to 11,115, 15,338.76 and 6,399.24

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Solution

The fourth proportional to 11,115, 15,338.76 and 6,399.24 is: 8,830.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,115 : 15,338.76 = 6,399.24 : x
  2. Step 2: Convert to fraction form
    11,115/15,338.76 = 6,399.24/x
  3. Step 3: Cross multiply
    11,115x = 15,338.76 × 6,399.24
  4. Step 4: Simplify right side
    11,115x = 98,156,406.54
  5. Step 5: Solve for x
    x = 98,156,406.54/11,115
  6. Step 6: Final answer
    x = 8,830.99

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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.