Home / 5,428.20-7,490.94-3,070.80

Finding the Fourth Proportional to 5,428.20, 7,490.94 and 3,070.80

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Solution

The fourth proportional to 5,428.20, 7,490.94 and 3,070.80 is: 4,237.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.20 : 7,490.94 = 3,070.80 : x
  2. Step 2: Convert to fraction form
    5,428.20/7,490.94 = 3,070.80/x
  3. Step 3: Cross multiply
    5,428.20x = 7,490.94 × 3,070.80
  4. Step 4: Simplify right side
    5,428.20x = 23,003,178.55
  5. Step 5: Solve for x
    x = 23,003,178.55/5,428.20
  6. Step 6: Final answer
    x = 4,237.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.