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Finding the Fourth Proportional to 7,215.85, 9,958.01 and 4,071.43

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Solution

The fourth proportional to 7,215.85, 9,958.01 and 4,071.43 is: 5,618.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,215.85 : 9,958.01 = 4,071.43 : x
  2. Step 2: Convert to fraction form
    7,215.85/9,958.01 = 4,071.43/x
  3. Step 3: Cross multiply
    7,215.85x = 9,958.01 × 4,071.43
  4. Step 4: Simplify right side
    7,215.85x = 40,543,320.30
  5. Step 5: Solve for x
    x = 40,543,320.30/7,215.85
  6. Step 6: Final answer
    x = 5,618.65

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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.