Home / 7,912.85-10,920.14-4,556.15

Finding the Fourth Proportional to 7,912.85, 10,920.14 and 4,556.15

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Solution

The fourth proportional to 7,912.85, 10,920.14 and 4,556.15 is: 6,287.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,912.85 : 10,920.14 = 4,556.15 : x
  2. Step 2: Convert to fraction form
    7,912.85/10,920.14 = 4,556.15/x
  3. Step 3: Cross multiply
    7,912.85x = 10,920.14 × 4,556.15
  4. Step 4: Simplify right side
    7,912.85x = 49,753,718.48
  5. Step 5: Solve for x
    x = 49,753,718.48/7,912.85
  6. Step 6: Final answer
    x = 6,287.72

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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.