Home / 5,420.20-8,130.30-2,647.30

Finding the Fourth Proportional to 5,420.20, 8,130.30 and 2,647.30

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Solution

The fourth proportional to 5,420.20, 8,130.30 and 2,647.30 is: 3,970.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.20 : 8,130.30 = 2,647.30 : x
  2. Step 2: Convert to fraction form
    5,420.20/8,130.30 = 2,647.30/x
  3. Step 3: Cross multiply
    5,420.20x = 8,130.30 × 2,647.30
  4. Step 4: Simplify right side
    5,420.20x = 21,523,343.19
  5. Step 5: Solve for x
    x = 21,523,343.19/5,420.20
  6. Step 6: Final answer
    x = 3,970.95

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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.