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Finding the Fourth Proportional to 7,666.70, 11,500.05 and 7,302.20

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Solution

The fourth proportional to 7,666.70, 11,500.05 and 7,302.20 is: 10,953.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,666.70 : 11,500.05 = 7,302.20 : x
  2. Step 2: Convert to fraction form
    7,666.70/11,500.05 = 7,302.20/x
  3. Step 3: Cross multiply
    7,666.70x = 11,500.05 × 7,302.20
  4. Step 4: Simplify right side
    7,666.70x = 83,975,665.11
  5. Step 5: Solve for x
    x = 83,975,665.11/7,666.70
  6. Step 6: Final answer
    x = 10,953.30

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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.