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Finding the Fourth Proportional to 18,428.01, 25,440 and 10,876.65

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Solution

The fourth proportional to 18,428.01, 25,440 and 10,876.65 is: 15,015.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,428.01 : 25,440 = 10,876.65 : x
  2. Step 2: Convert to fraction form
    18,428.01/25,440 = 10,876.65/x
  3. Step 3: Cross multiply
    18,428.01x = 25,440 × 10,876.65
  4. Step 4: Simplify right side
    18,428.01x = 276,701,976
  5. Step 5: Solve for x
    x = 276,701,976/18,428.01
  6. Step 6: Final answer
    x = 15,015.29

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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.