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Finding the Fourth Proportional to 18,941.25, 28,386.36 and 7,248.09

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Solution

The fourth proportional to 18,941.25, 28,386.36 and 7,248.09 is: 10,862.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,941.25 : 28,386.36 = 7,248.09 : x
  2. Step 2: Convert to fraction form
    18,941.25/28,386.36 = 7,248.09/x
  3. Step 3: Cross multiply
    18,941.25x = 28,386.36 × 7,248.09
  4. Step 4: Simplify right side
    18,941.25x = 205,746,892.05
  5. Step 5: Solve for x
    x = 205,746,892.05/18,941.25
  6. Step 6: Final answer
    x = 10,862.37

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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.