Home / 8,115.40-11,202.42-5,321.80

Finding the Fourth Proportional to 8,115.40, 11,202.42 and 5,321.80

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Solution

The fourth proportional to 8,115.40, 11,202.42 and 5,321.80 is: 7,346.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,115.40 : 11,202.42 = 5,321.80 : x
  2. Step 2: Convert to fraction form
    8,115.40/11,202.42 = 5,321.80/x
  3. Step 3: Cross multiply
    8,115.40x = 11,202.42 × 5,321.80
  4. Step 4: Simplify right side
    8,115.40x = 59,617,038.76
  5. Step 5: Solve for x
    x = 59,617,038.76/8,115.40
  6. Step 6: Final answer
    x = 7,346.16

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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.