Home / 5,420.70-8,135.61-3,784.38

Finding the Fourth Proportional to 5,420.70, 8,135.61 and 3,784.38

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Solution

The fourth proportional to 5,420.70, 8,135.61 and 3,784.38 is: 5,679.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.70 : 8,135.61 = 3,784.38 : x
  2. Step 2: Convert to fraction form
    5,420.70/8,135.61 = 3,784.38/x
  3. Step 3: Cross multiply
    5,420.70x = 8,135.61 × 3,784.38
  4. Step 4: Simplify right side
    5,420.70x = 30,788,239.77
  5. Step 5: Solve for x
    x = 30,788,239.77/5,420.70
  6. Step 6: Final answer
    x = 5,679.75

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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.