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Finding the Fourth Proportional to 7,750.76, 10,696.12 and 4,213.96

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Solution

The fourth proportional to 7,750.76, 10,696.12 and 4,213.96 is: 5,815.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,750.76 : 10,696.12 = 4,213.96 : x
  2. Step 2: Convert to fraction form
    7,750.76/10,696.12 = 4,213.96/x
  3. Step 3: Cross multiply
    7,750.76x = 10,696.12 × 4,213.96
  4. Step 4: Simplify right side
    7,750.76x = 45,072,984.56
  5. Step 5: Solve for x
    x = 45,072,984.56/7,750.76
  6. Step 6: Final answer
    x = 5,815.30

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Double scale
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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.