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Finding the Fourth Proportional to 8,608.74, 12,913.11 and 7,066.50

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Solution

The fourth proportional to 8,608.74, 12,913.11 and 7,066.50 is: 10,599.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,608.74 : 12,913.11 = 7,066.50 : x
  2. Step 2: Convert to fraction form
    8,608.74/12,913.11 = 7,066.50/x
  3. Step 3: Cross multiply
    8,608.74x = 12,913.11 × 7,066.50
  4. Step 4: Simplify right side
    8,608.74x = 91,250,491.82
  5. Step 5: Solve for x
    x = 91,250,491.82/8,608.74
  6. Step 6: Final answer
    x = 10,599.75

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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.