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Finding the Fourth Proportional to 20,347.44, 28,080 and 11,394.90

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Solution

The fourth proportional to 20,347.44, 28,080 and 11,394.90 is: 15,725.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,347.44 : 28,080 = 11,394.90 : x
  2. Step 2: Convert to fraction form
    20,347.44/28,080 = 11,394.90/x
  3. Step 3: Cross multiply
    20,347.44x = 28,080 × 11,394.90
  4. Step 4: Simplify right side
    20,347.44x = 319,968,792
  5. Step 5: Solve for x
    x = 319,968,792/20,347.44
  6. Step 6: Final answer
    x = 15,725.26

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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.