Home / 7,280.20-10,914.90-3,116.80

Finding the Fourth Proportional to 7,280.20, 10,914.90 and 3,116.80

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Solution

The fourth proportional to 7,280.20, 10,914.90 and 3,116.80 is: 4,672.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,280.20 : 10,914.90 = 3,116.80 : x
  2. Step 2: Convert to fraction form
    7,280.20/10,914.90 = 3,116.80/x
  3. Step 3: Cross multiply
    7,280.20x = 10,914.90 × 3,116.80
  4. Step 4: Simplify right side
    7,280.20x = 34,019,560.32
  5. Step 5: Solve for x
    x = 34,019,560.32/7,280.20
  6. Step 6: Final answer
    x = 4,672.89

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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.