Home / 11,181.12-15,431.40-7,213.77

Finding the Fourth Proportional to 11,181.12, 15,431.40 and 7,213.77

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Solution

The fourth proportional to 11,181.12, 15,431.40 and 7,213.77 is: 9,955.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,181.12 : 15,431.40 = 7,213.77 : x
  2. Step 2: Convert to fraction form
    11,181.12/15,431.40 = 7,213.77/x
  3. Step 3: Cross multiply
    11,181.12x = 15,431.40 × 7,213.77
  4. Step 4: Simplify right side
    11,181.12x = 111,318,626.99
  5. Step 5: Solve for x
    x = 111,318,626.99/11,181.12
  6. Step 6: Final answer
    x = 9,955.95

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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.