Home / 3,748.48-5,172.84-2,155.30

Finding the Fourth Proportional to 3,748.48, 5,172.84 and 2,155.30

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Solution

The fourth proportional to 3,748.48, 5,172.84 and 2,155.30 is: 2,974.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,748.48 : 5,172.84 = 2,155.30 : x
  2. Step 2: Convert to fraction form
    3,748.48/5,172.84 = 2,155.30/x
  3. Step 3: Cross multiply
    3,748.48x = 5,172.84 × 2,155.30
  4. Step 4: Simplify right side
    3,748.48x = 11,149,009.12
  5. Step 5: Solve for x
    x = 11,149,009.12/3,748.48
  6. Step 6: Final answer
    x = 2,974.28

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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.