Home / 7,180.40-10,770.60-3,681.20

Finding the Fourth Proportional to 7,180.40, 10,770.60 and 3,681.20

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Solution

The fourth proportional to 7,180.40, 10,770.60 and 3,681.20 is: 5,521.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,180.40 : 10,770.60 = 3,681.20 : x
  2. Step 2: Convert to fraction form
    7,180.40/10,770.60 = 3,681.20/x
  3. Step 3: Cross multiply
    7,180.40x = 10,770.60 × 3,681.20
  4. Step 4: Simplify right side
    7,180.40x = 39,648,732.72
  5. Step 5: Solve for x
    x = 39,648,732.72/7,180.40
  6. Step 6: Final answer
    x = 5,521.80

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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.