Home / 21,388.71-29,517.55-12,893.54

Finding the Fourth Proportional to 21,388.71, 29,517.55 and 12,893.54

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Solution

The fourth proportional to 21,388.71, 29,517.55 and 12,893.54 is: 17,793.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,388.71 : 29,517.55 = 12,893.54 : x
  2. Step 2: Convert to fraction form
    21,388.71/29,517.55 = 12,893.54/x
  3. Step 3: Cross multiply
    21,388.71x = 29,517.55 × 12,893.54
  4. Step 4: Simplify right side
    21,388.71x = 380,585,531.81
  5. Step 5: Solve for x
    x = 380,585,531.81/21,388.71
  6. Step 6: Final answer
    x = 17,793.75

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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.