Home / 21,052.40-31,540.20-17,135.60

Finding the Fourth Proportional to 21,052.40, 31,540.20 and 17,135.60

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Solution

The fourth proportional to 21,052.40, 31,540.20 and 17,135.60 is: 25,672.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,052.40 : 31,540.20 = 17,135.60 : x
  2. Step 2: Convert to fraction form
    21,052.40/31,540.20 = 17,135.60/x
  3. Step 3: Cross multiply
    21,052.40x = 31,540.20 × 17,135.60
  4. Step 4: Simplify right side
    21,052.40x = 540,460,251.12
  5. Step 5: Solve for x
    x = 540,460,251.12/21,052.40
  6. Step 6: Final answer
    x = 25,672.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.