Home / 11,388.33-15,723.20-7,145.20

Finding the Fourth Proportional to 11,388.33, 15,723.20 and 7,145.20

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Solution

The fourth proportional to 11,388.33, 15,723.20 and 7,145.20 is: 9,864.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,388.33 : 15,723.20 = 7,145.20 : x
  2. Step 2: Convert to fraction form
    11,388.33/15,723.20 = 7,145.20/x
  3. Step 3: Cross multiply
    11,388.33x = 15,723.20 × 7,145.20
  4. Step 4: Simplify right side
    11,388.33x = 112,345,408.64
  5. Step 5: Solve for x
    x = 112,345,408.64/11,388.33
  6. Step 6: Final answer
    x = 9,864.96

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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.