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Finding the Fourth Proportional to 7,108.66, 9,810.39 and 3,921.94

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Solution

The fourth proportional to 7,108.66, 9,810.39 and 3,921.94 is: 5,412.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,108.66 : 9,810.39 = 3,921.94 : x
  2. Step 2: Convert to fraction form
    7,108.66/9,810.39 = 3,921.94/x
  3. Step 3: Cross multiply
    7,108.66x = 9,810.39 × 3,921.94
  4. Step 4: Simplify right side
    7,108.66x = 38,475,760.96
  5. Step 5: Solve for x
    x = 38,475,760.96/7,108.66
  6. Step 6: Final answer
    x = 5,412.52

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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.