Home / 20,261.90-27,974.44-12,718.58

Finding the Fourth Proportional to 20,261.90, 27,974.44 and 12,718.58

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Solution

The fourth proportional to 20,261.90, 27,974.44 and 12,718.58 is: 17,559.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,261.90 : 27,974.44 = 12,718.58 : x
  2. Step 2: Convert to fraction form
    20,261.90/27,974.44 = 12,718.58/x
  3. Step 3: Cross multiply
    20,261.90x = 27,974.44 × 12,718.58
  4. Step 4: Simplify right side
    20,261.90x = 355,795,153.10
  5. Step 5: Solve for x
    x = 355,795,153.10/20,261.90
  6. Step 6: Final answer
    x = 17,559.81

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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.