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Finding the Fourth Proportional to 7,215.80, 9,958.07 and 5,956.25

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Solution

The fourth proportional to 7,215.80, 9,958.07 and 5,956.25 is: 8,219.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,215.80 : 9,958.07 = 5,956.25 : x
  2. Step 2: Convert to fraction form
    7,215.80/9,958.07 = 5,956.25/x
  3. Step 3: Cross multiply
    7,215.80x = 9,958.07 × 5,956.25
  4. Step 4: Simplify right side
    7,215.80x = 59,312,719.54
  5. Step 5: Solve for x
    x = 59,312,719.54/7,215.80
  6. Step 6: Final answer
    x = 8,219.85

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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.