Home / 11,187.54-15,440.07-7,158.12

Finding the Fourth Proportional to 11,187.54, 15,440.07 and 7,158.12

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Solution

The fourth proportional to 11,187.54, 15,440.07 and 7,158.12 is: 9,879.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,187.54 : 15,440.07 = 7,158.12 : x
  2. Step 2: Convert to fraction form
    11,187.54/15,440.07 = 7,158.12/x
  3. Step 3: Cross multiply
    11,187.54x = 15,440.07 × 7,158.12
  4. Step 4: Simplify right side
    11,187.54x = 110,521,873.87
  5. Step 5: Solve for x
    x = 110,521,873.87/11,187.54
  6. Step 6: Final answer
    x = 9,879.01

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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.