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Finding the Fourth Proportional to 9,186.64, 13,758.06 and 5,020.40

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Solution

The fourth proportional to 9,186.64, 13,758.06 and 5,020.40 is: 7,518.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,186.64 : 13,758.06 = 5,020.40 : x
  2. Step 2: Convert to fraction form
    9,186.64/13,758.06 = 5,020.40/x
  3. Step 3: Cross multiply
    9,186.64x = 13,758.06 × 5,020.40
  4. Step 4: Simplify right side
    9,186.64x = 69,070,964.42
  5. Step 5: Solve for x
    x = 69,070,964.42/9,186.64
  6. Step 6: Final answer
    x = 7,518.63

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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.