Home / 20,948.33-28,905.47-12,447.31

Finding the Fourth Proportional to 20,948.33, 28,905.47 and 12,447.31

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Solution

The fourth proportional to 20,948.33, 28,905.47 and 12,447.31 is: 17,175.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,948.33 : 28,905.47 = 12,447.31 : x
  2. Step 2: Convert to fraction form
    20,948.33/28,905.47 = 12,447.31/x
  3. Step 3: Cross multiply
    20,948.33x = 28,905.47 × 12,447.31
  4. Step 4: Simplify right side
    20,948.33x = 359,795,345.79
  5. Step 5: Solve for x
    x = 359,795,345.79/20,948.33
  6. Step 6: Final answer
    x = 17,175.37

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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.