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Finding the Fourth Proportional to 6,905.11, 9,528.71 and 3,920.55

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Solution

The fourth proportional to 6,905.11, 9,528.71 and 3,920.55 is: 5,410.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,905.11 : 9,528.71 = 3,920.55 : x
  2. Step 2: Convert to fraction form
    6,905.11/9,528.71 = 3,920.55/x
  3. Step 3: Cross multiply
    6,905.11x = 9,528.71 × 3,920.55
  4. Step 4: Simplify right side
    6,905.11x = 37,357,817.61
  5. Step 5: Solve for x
    x = 37,357,817.61/6,905.11
  6. Step 6: Final answer
    x = 5,410.17

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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.