Home / 20,172.73-27,840.90-12,215.02

Finding the Fourth Proportional to 20,172.73, 27,840.90 and 12,215.02

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Solution

The fourth proportional to 20,172.73, 27,840.90 and 12,215.02 is: 16,858.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,172.73 : 27,840.90 = 12,215.02 : x
  2. Step 2: Convert to fraction form
    20,172.73/27,840.90 = 12,215.02/x
  3. Step 3: Cross multiply
    20,172.73x = 27,840.90 × 12,215.02
  4. Step 4: Simplify right side
    20,172.73x = 340,077,150.32
  5. Step 5: Solve for x
    x = 340,077,150.32/20,172.73
  6. Step 6: Final answer
    x = 16,858.26

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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.