Home / 20,912.73-28,850.15-12,415.19

Finding the Fourth Proportional to 20,912.73, 28,850.15 and 12,415.19

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Solution

The fourth proportional to 20,912.73, 28,850.15 and 12,415.19 is: 17,127.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.73 : 28,850.15 = 12,415.19 : x
  2. Step 2: Convert to fraction form
    20,912.73/28,850.15 = 12,415.19/x
  3. Step 3: Cross multiply
    20,912.73x = 28,850.15 × 12,415.19
  4. Step 4: Simplify right side
    20,912.73x = 358,179,887.45
  5. Step 5: Solve for x
    x = 358,179,887.45/20,912.73
  6. Step 6: Final answer
    x = 17,127.36

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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.