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Finding the Fourth Proportional to 9,136.96, 12,608.96 and 4,945.20

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Solution

The fourth proportional to 9,136.96, 12,608.96 and 4,945.20 is: 6,824.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,136.96 : 12,608.96 = 4,945.20 : x
  2. Step 2: Convert to fraction form
    9,136.96/12,608.96 = 4,945.20/x
  3. Step 3: Cross multiply
    9,136.96x = 12,608.96 × 4,945.20
  4. Step 4: Simplify right side
    9,136.96x = 62,353,828.99
  5. Step 5: Solve for x
    x = 62,353,828.99/9,136.96
  6. Step 6: Final answer
    x = 6,824.35

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