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Finding the Fourth Proportional to 28,237.84, 38,968.22 and 15,662.58

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Solution

The fourth proportional to 28,237.84, 38,968.22 and 15,662.58 is: 21,614.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,237.84 : 38,968.22 = 15,662.58 : x
  2. Step 2: Convert to fraction form
    28,237.84/38,968.22 = 15,662.58/x
  3. Step 3: Cross multiply
    28,237.84x = 38,968.22 × 15,662.58
  4. Step 4: Simplify right side
    28,237.84x = 610,342,863.21
  5. Step 5: Solve for x
    x = 610,342,863.21/28,237.84
  6. Step 6: Final answer
    x = 21,614.36

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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.