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Finding the Fourth Proportional to 11,019.16, 15,212.80 and 8,361.92

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Solution

The fourth proportional to 11,019.16, 15,212.80 and 8,361.92 is: 11,544.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,019.16 : 15,212.80 = 8,361.92 : x
  2. Step 2: Convert to fraction form
    11,019.16/15,212.80 = 8,361.92/x
  3. Step 3: Cross multiply
    11,019.16x = 15,212.80 × 8,361.92
  4. Step 4: Simplify right side
    11,019.16x = 127,208,216.58
  5. Step 5: Solve for x
    x = 127,208,216.58/11,019.16
  6. Step 6: Final answer
    x = 11,544.28

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Double scale
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Similar ratio
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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.