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Finding the Fourth Proportional to 7,035.72, 9,709.02 and 3,891.84

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Solution

The fourth proportional to 7,035.72, 9,709.02 and 3,891.84 is: 5,370.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,035.72 : 9,709.02 = 3,891.84 : x
  2. Step 2: Convert to fraction form
    7,035.72/9,709.02 = 3,891.84/x
  3. Step 3: Cross multiply
    7,035.72x = 9,709.02 × 3,891.84
  4. Step 4: Simplify right side
    7,035.72x = 37,785,952.40
  5. Step 5: Solve for x
    x = 37,785,952.40/7,035.72
  6. Step 6: Final answer
    x = 5,370.59

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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.