Home / 7,421.40-11,132.10-4,942.80

Finding the Fourth Proportional to 7,421.40, 11,132.10 and 4,942.80

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Solution

The fourth proportional to 7,421.40, 11,132.10 and 4,942.80 is: 7,414.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,421.40 : 11,132.10 = 4,942.80 : x
  2. Step 2: Convert to fraction form
    7,421.40/11,132.10 = 4,942.80/x
  3. Step 3: Cross multiply
    7,421.40x = 11,132.10 × 4,942.80
  4. Step 4: Simplify right side
    7,421.40x = 55,023,743.88
  5. Step 5: Solve for x
    x = 55,023,743.88/7,421.40
  6. Step 6: Final answer
    x = 7,414.20

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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.