Home / 11,111.91-15,338.30-6,398.07

Finding the Fourth Proportional to 11,111.91, 15,338.30 and 6,398.07

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Solution

The fourth proportional to 11,111.91, 15,338.30 and 6,398.07 is: 8,831.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,111.91 : 15,338.30 = 6,398.07 : x
  2. Step 2: Convert to fraction form
    11,111.91/15,338.30 = 6,398.07/x
  3. Step 3: Cross multiply
    11,111.91x = 15,338.30 × 6,398.07
  4. Step 4: Simplify right side
    11,111.91x = 98,135,485.09
  5. Step 5: Solve for x
    x = 98,135,485.09/11,111.91
  6. Step 6: Final answer
    x = 8,831.56

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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.