Home / 11,145.40-15,379.14-7,171.84

Finding the Fourth Proportional to 11,145.40, 15,379.14 and 7,171.84

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Solution

The fourth proportional to 11,145.40, 15,379.14 and 7,171.84 is: 9,896.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,145.40 : 15,379.14 = 7,171.84 : x
  2. Step 2: Convert to fraction form
    11,145.40/15,379.14 = 7,171.84/x
  3. Step 3: Cross multiply
    11,145.40x = 15,379.14 × 7,171.84
  4. Step 4: Simplify right side
    11,145.40x = 110,296,731.42
  5. Step 5: Solve for x
    x = 110,296,731.42/11,145.40
  6. Step 6: Final answer
    x = 9,896.17

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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.