Home / 11,815.36-16,305.12-7,099.60

Finding the Fourth Proportional to 11,815.36, 16,305.12 and 7,099.60

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Solution

The fourth proportional to 11,815.36, 16,305.12 and 7,099.60 is: 9,797.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,815.36 : 16,305.12 = 7,099.60 : x
  2. Step 2: Convert to fraction form
    11,815.36/16,305.12 = 7,099.60/x
  3. Step 3: Cross multiply
    11,815.36x = 16,305.12 × 7,099.60
  4. Step 4: Simplify right side
    11,815.36x = 115,759,829.95
  5. Step 5: Solve for x
    x = 115,759,829.95/11,815.36
  6. Step 6: Final answer
    x = 9,797.40

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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.