Home / 5,420.40-8,118.45-2,820.30

Finding the Fourth Proportional to 5,420.40, 8,118.45 and 2,820.30

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Solution

The fourth proportional to 5,420.40, 8,118.45 and 2,820.30 is: 4,224.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.40 : 8,118.45 = 2,820.30 : x
  2. Step 2: Convert to fraction form
    5,420.40/8,118.45 = 2,820.30/x
  3. Step 3: Cross multiply
    5,420.40x = 8,118.45 × 2,820.30
  4. Step 4: Simplify right side
    5,420.40x = 22,896,464.54
  5. Step 5: Solve for x
    x = 22,896,464.54/5,420.40
  6. Step 6: Final answer
    x = 4,224.13

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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.