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Finding the Fourth Proportional to 18,372.38, 25,356.06 and 10,920.38

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Solution

The fourth proportional to 18,372.38, 25,356.06 and 10,920.38 is: 15,071.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,372.38 : 25,356.06 = 10,920.38 : x
  2. Step 2: Convert to fraction form
    18,372.38/25,356.06 = 10,920.38/x
  3. Step 3: Cross multiply
    18,372.38x = 25,356.06 × 10,920.38
  4. Step 4: Simplify right side
    18,372.38x = 276,897,683.72
  5. Step 5: Solve for x
    x = 276,897,683.72/18,372.38
  6. Step 6: Final answer
    x = 15,071.41

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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.