Home / 2,172.87-3,000.52-1,388.29

Finding the Fourth Proportional to 2,172.87, 3,000.52 and 1,388.29

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Solution

The fourth proportional to 2,172.87, 3,000.52 and 1,388.29 is: 1,917.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.87 : 3,000.52 = 1,388.29 : x
  2. Step 2: Convert to fraction form
    2,172.87/3,000.52 = 1,388.29/x
  3. Step 3: Cross multiply
    2,172.87x = 3,000.52 × 1,388.29
  4. Step 4: Simplify right side
    2,172.87x = 4,165,580.94
  5. Step 5: Solve for x
    x = 4,165,580.94/2,172.87
  6. Step 6: Final answer
    x = 1,917.08

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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.