Home / 28,203.45-38,921.16-15,456.43

Finding the Fourth Proportional to 28,203.45, 38,921.16 and 15,456.43

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Solution

The fourth proportional to 28,203.45, 38,921.16 and 15,456.43 is: 21,330.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,203.45 : 38,921.16 = 15,456.43 : x
  2. Step 2: Convert to fraction form
    28,203.45/38,921.16 = 15,456.43/x
  3. Step 3: Cross multiply
    28,203.45x = 38,921.16 × 15,456.43
  4. Step 4: Simplify right side
    28,203.45x = 601,582,185.06
  5. Step 5: Solve for x
    x = 601,582,185.06/28,203.45
  6. Step 6: Final answer
    x = 21,330.09

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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.