Home / 11,101.86-15,318.72-7,122.20

Finding the Fourth Proportional to 11,101.86, 15,318.72 and 7,122.20

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Solution

The fourth proportional to 11,101.86, 15,318.72 and 7,122.20 is: 9,827.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,101.86 : 15,318.72 = 7,122.20 : x
  2. Step 2: Convert to fraction form
    11,101.86/15,318.72 = 7,122.20/x
  3. Step 3: Cross multiply
    11,101.86x = 15,318.72 × 7,122.20
  4. Step 4: Simplify right side
    11,101.86x = 109,102,910.99
  5. Step 5: Solve for x
    x = 109,102,910.99/11,101.86
  6. Step 6: Final answer
    x = 9,827.44

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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.