Home / 11,102.74-15,314.27-7,128.68

Finding the Fourth Proportional to 11,102.74, 15,314.27 and 7,128.68

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Solution

The fourth proportional to 11,102.74, 15,314.27 and 7,128.68 is: 9,832.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,102.74 : 15,314.27 = 7,128.68 : x
  2. Step 2: Convert to fraction form
    11,102.74/15,314.27 = 7,128.68/x
  3. Step 3: Cross multiply
    11,102.74x = 15,314.27 × 7,128.68
  4. Step 4: Simplify right side
    11,102.74x = 109,170,418.05
  5. Step 5: Solve for x
    x = 109,170,418.05/11,102.74
  6. Step 6: Final answer
    x = 9,832.75

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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.