Home / 7,278.88-10,920.16-3,116.80

Finding the Fourth Proportional to 7,278.88, 10,920.16 and 3,116.80

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Solution

The fourth proportional to 7,278.88, 10,920.16 and 3,116.80 is: 4,675.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,278.88 : 10,920.16 = 3,116.80 : x
  2. Step 2: Convert to fraction form
    7,278.88/10,920.16 = 3,116.80/x
  3. Step 3: Cross multiply
    7,278.88x = 10,920.16 × 3,116.80
  4. Step 4: Simplify right side
    7,278.88x = 34,035,954.69
  5. Step 5: Solve for x
    x = 34,035,954.69/7,278.88
  6. Step 6: Final answer
    x = 4,675.99

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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.