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Finding the Fourth Proportional to 7,215.94, 9,958.81 and 4,071.88

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Solution

The fourth proportional to 7,215.94, 9,958.81 and 4,071.88 is: 5,619.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,215.94 : 9,958.81 = 4,071.88 : x
  2. Step 2: Convert to fraction form
    7,215.94/9,958.81 = 4,071.88/x
  3. Step 3: Cross multiply
    7,215.94x = 9,958.81 × 4,071.88
  4. Step 4: Simplify right side
    7,215.94x = 40,551,029.47
  5. Step 5: Solve for x
    x = 40,551,029.47/7,215.94
  6. Step 6: Final answer
    x = 5,619.65

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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.