Home / 2,172.30-2,993.67-2,139.90

Finding the Fourth Proportional to 2,172.30, 2,993.67 and 2,139.90

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Solution

The fourth proportional to 2,172.30, 2,993.67 and 2,139.90 is: 2,949.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.30 : 2,993.67 = 2,139.90 : x
  2. Step 2: Convert to fraction form
    2,172.30/2,993.67 = 2,139.90/x
  3. Step 3: Cross multiply
    2,172.30x = 2,993.67 × 2,139.90
  4. Step 4: Simplify right side
    2,172.30x = 6,406,154.43
  5. Step 5: Solve for x
    x = 6,406,154.43/2,172.30
  6. Step 6: Final answer
    x = 2,949.02

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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.