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Finding the Fourth Proportional to 9,326.75, 12,786.86 and 9,160.90

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Solution

The fourth proportional to 9,326.75, 12,786.86 and 9,160.90 is: 12,559.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,326.75 : 12,786.86 = 9,160.90 : x
  2. Step 2: Convert to fraction form
    9,326.75/12,786.86 = 9,160.90/x
  3. Step 3: Cross multiply
    9,326.75x = 12,786.86 × 9,160.90
  4. Step 4: Simplify right side
    9,326.75x = 117,139,136.71
  5. Step 5: Solve for x
    x = 117,139,136.71/9,326.75
  6. Step 6: Final answer
    x = 12,559.49

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.