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Finding the Fourth Proportional to 7,141.86, 9,855.75 and 3,955.41

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Solution

The fourth proportional to 7,141.86, 9,855.75 and 3,955.41 is: 5,458.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,141.86 : 9,855.75 = 3,955.41 : x
  2. Step 2: Convert to fraction form
    7,141.86/9,855.75 = 3,955.41/x
  3. Step 3: Cross multiply
    7,141.86x = 9,855.75 × 3,955.41
  4. Step 4: Simplify right side
    7,141.86x = 38,983,532.11
  5. Step 5: Solve for x
    x = 38,983,532.11/7,141.86
  6. Step 6: Final answer
    x = 5,458.46

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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.