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Finding the Fourth Proportional to 7,125.94, 9,833.60 and 3,939.22

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Solution

The fourth proportional to 7,125.94, 9,833.60 and 3,939.22 is: 5,436.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,125.94 : 9,833.60 = 3,939.22 : x
  2. Step 2: Convert to fraction form
    7,125.94/9,833.60 = 3,939.22/x
  3. Step 3: Cross multiply
    7,125.94x = 9,833.60 × 3,939.22
  4. Step 4: Simplify right side
    7,125.94x = 38,736,713.79
  5. Step 5: Solve for x
    x = 38,736,713.79/7,125.94
  6. Step 6: Final answer
    x = 5,436.01

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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.