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Finding the Fourth Proportional to 18,940.70, 26,140.68 and 10,877.54

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Solution

The fourth proportional to 18,940.70, 26,140.68 and 10,877.54 is: 15,012.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,940.70 : 26,140.68 = 10,877.54 : x
  2. Step 2: Convert to fraction form
    18,940.70/26,140.68 = 10,877.54/x
  3. Step 3: Cross multiply
    18,940.70x = 26,140.68 × 10,877.54
  4. Step 4: Simplify right side
    18,940.70x = 284,346,292.33
  5. Step 5: Solve for x
    x = 284,346,292.33/18,940.70
  6. Step 6: Final answer
    x = 15,012.45

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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.