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Finding the Fourth Proportional to 8,645.61, 11,926.13 and 5,666.25

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Solution

The fourth proportional to 8,645.61, 11,926.13 and 5,666.25 is: 7,816.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,645.61 : 11,926.13 = 5,666.25 : x
  2. Step 2: Convert to fraction form
    8,645.61/11,926.13 = 5,666.25/x
  3. Step 3: Cross multiply
    8,645.61x = 11,926.13 × 5,666.25
  4. Step 4: Simplify right side
    8,645.61x = 67,576,434.11
  5. Step 5: Solve for x
    x = 67,576,434.11/8,645.61
  6. Step 6: Final answer
    x = 7,816.27

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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.