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Finding the Fourth Proportional to 7,136.10, 10,704.15 and 6,812.10

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Solution

The fourth proportional to 7,136.10, 10,704.15 and 6,812.10 is: 10,218.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,136.10 : 10,704.15 = 6,812.10 : x
  2. Step 2: Convert to fraction form
    7,136.10/10,704.15 = 6,812.10/x
  3. Step 3: Cross multiply
    7,136.10x = 10,704.15 × 6,812.10
  4. Step 4: Simplify right side
    7,136.10x = 72,917,740.22
  5. Step 5: Solve for x
    x = 72,917,740.22/7,136.10
  6. Step 6: Final answer
    x = 10,218.15

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Half scale
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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.