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Finding the Fourth Proportional to 15,307.68, 22,939.61 and 8,720.25

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Solution

The fourth proportional to 15,307.68, 22,939.61 and 8,720.25 is: 13,067.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,307.68 : 22,939.61 = 8,720.25 : x
  2. Step 2: Convert to fraction form
    15,307.68/22,939.61 = 8,720.25/x
  3. Step 3: Cross multiply
    15,307.68x = 22,939.61 × 8,720.25
  4. Step 4: Simplify right side
    15,307.68x = 200,039,090.50
  5. Step 5: Solve for x
    x = 200,039,090.50/15,307.68
  6. Step 6: Final answer
    x = 13,067.89

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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.