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Finding the Fourth Proportional to 7,175.13, 9,901.79 and 3,945.08

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Solution

The fourth proportional to 7,175.13, 9,901.79 and 3,945.08 is: 5,444.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,175.13 : 9,901.79 = 3,945.08 : x
  2. Step 2: Convert to fraction form
    7,175.13/9,901.79 = 3,945.08/x
  3. Step 3: Cross multiply
    7,175.13x = 9,901.79 × 3,945.08
  4. Step 4: Simplify right side
    7,175.13x = 39,063,395.79
  5. Step 5: Solve for x
    x = 39,063,395.79/7,175.13
  6. Step 6: Final answer
    x = 5,444.28

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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.