Home / 20,415.25-28,172.83-11,462.54

Finding the Fourth Proportional to 20,415.25, 28,172.83 and 11,462.54

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Solution

The fourth proportional to 20,415.25, 28,172.83 and 11,462.54 is: 15,818.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,415.25 : 28,172.83 = 11,462.54 : x
  2. Step 2: Convert to fraction form
    20,415.25/28,172.83 = 11,462.54/x
  3. Step 3: Cross multiply
    20,415.25x = 28,172.83 × 11,462.54
  4. Step 4: Simplify right side
    20,415.25x = 322,932,133.48
  5. Step 5: Solve for x
    x = 322,932,133.48/20,415.25
  6. Step 6: Final answer
    x = 15,818.19

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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.