Home / 7,217.50-10,770.40-6,439.90

Finding the Fourth Proportional to 7,217.50, 10,770.40 and 6,439.90

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Solution

The fourth proportional to 7,217.50, 10,770.40 and 6,439.90 is: 9,610.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,217.50 : 10,770.40 = 6,439.90 : x
  2. Step 2: Convert to fraction form
    7,217.50/10,770.40 = 6,439.90/x
  3. Step 3: Cross multiply
    7,217.50x = 10,770.40 × 6,439.90
  4. Step 4: Simplify right side
    7,217.50x = 69,360,298.96
  5. Step 5: Solve for x
    x = 69,360,298.96/7,217.50
  6. Step 6: Final answer
    x = 9,610.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.