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Finding the Fourth Proportional to 18,968.14, 28,438.16 and 9,098.02

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Solution

The fourth proportional to 18,968.14, 28,438.16 and 9,098.02 is: 13,640.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,968.14 : 28,438.16 = 9,098.02 : x
  2. Step 2: Convert to fraction form
    18,968.14/28,438.16 = 9,098.02/x
  3. Step 3: Cross multiply
    18,968.14x = 28,438.16 × 9,098.02
  4. Step 4: Simplify right side
    18,968.14x = 258,730,938.50
  5. Step 5: Solve for x
    x = 258,730,938.50/18,968.14
  6. Step 6: Final answer
    x = 13,640.29

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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.