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Finding the Fourth Proportional to 10,361.70, 15,542.55 and 7,190.55

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Solution

The fourth proportional to 10,361.70, 15,542.55 and 7,190.55 is: 10,785.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,361.70 : 15,542.55 = 7,190.55 : x
  2. Step 2: Convert to fraction form
    10,361.70/15,542.55 = 7,190.55/x
  3. Step 3: Cross multiply
    10,361.70x = 15,542.55 × 7,190.55
  4. Step 4: Simplify right side
    10,361.70x = 111,759,482.90
  5. Step 5: Solve for x
    x = 111,759,482.90/10,361.70
  6. Step 6: Final answer
    x = 10,785.83

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.