Home / 2,619.24-3,605.16-2,172.12

Finding the Fourth Proportional to 2,619.24, 3,605.16 and 2,172.12

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Solution

The fourth proportional to 2,619.24, 3,605.16 and 2,172.12 is: 2,989.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,619.24 : 3,605.16 = 2,172.12 : x
  2. Step 2: Convert to fraction form
    2,619.24/3,605.16 = 2,172.12/x
  3. Step 3: Cross multiply
    2,619.24x = 3,605.16 × 2,172.12
  4. Step 4: Simplify right side
    2,619.24x = 7,830,840.14
  5. Step 5: Solve for x
    x = 7,830,840.14/2,619.24
  6. Step 6: Final answer
    x = 2,989.74

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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.