Home / 7,945.16-11,918.20-2,679.72

Finding the Fourth Proportional to 7,945.16, 11,918.20 and 2,679.72

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Solution

The fourth proportional to 7,945.16, 11,918.20 and 2,679.72 is: 4,019.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,945.16 : 11,918.20 = 2,679.72 : x
  2. Step 2: Convert to fraction form
    7,945.16/11,918.20 = 2,679.72/x
  3. Step 3: Cross multiply
    7,945.16x = 11,918.20 × 2,679.72
  4. Step 4: Simplify right side
    7,945.16x = 31,937,438.90
  5. Step 5: Solve for x
    x = 31,937,438.90/7,945.16
  6. Step 6: Final answer
    x = 4,019.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.