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Finding the Fourth Proportional to 6,905.05, 9,528.63 and 3,920.49

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Solution

The fourth proportional to 6,905.05, 9,528.63 and 3,920.49 is: 5,410.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,905.05 : 9,528.63 = 3,920.49 : x
  2. Step 2: Convert to fraction form
    6,905.05/9,528.63 = 3,920.49/x
  3. Step 3: Cross multiply
    6,905.05x = 9,528.63 × 3,920.49
  4. Step 4: Simplify right side
    6,905.05x = 37,356,883.93
  5. Step 5: Solve for x
    x = 37,356,883.93/6,905.05
  6. Step 6: Final answer
    x = 5,410.08

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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.