Home / 2,420.10-3,638.15-2,103.30

Finding the Fourth Proportional to 2,420.10, 3,638.15 and 2,103.30

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Solution

The fourth proportional to 2,420.10, 3,638.15 and 2,103.30 is: 3,161.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,420.10 : 3,638.15 = 2,103.30 : x
  2. Step 2: Convert to fraction form
    2,420.10/3,638.15 = 2,103.30/x
  3. Step 3: Cross multiply
    2,420.10x = 3,638.15 × 2,103.30
  4. Step 4: Simplify right side
    2,420.10x = 7,652,120.90
  5. Step 5: Solve for x
    x = 7,652,120.90/2,420.10
  6. Step 6: Final answer
    x = 3,161.90

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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.