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Finding the Fourth Proportional to 18,840.87, 25,992.99 and 10,881.54

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Solution

The fourth proportional to 18,840.87, 25,992.99 and 10,881.54 is: 15,012.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,840.87 : 25,992.99 = 10,881.54 : x
  2. Step 2: Convert to fraction form
    18,840.87/25,992.99 = 10,881.54/x
  3. Step 3: Cross multiply
    18,840.87x = 25,992.99 × 10,881.54
  4. Step 4: Simplify right side
    18,840.87x = 282,843,760.40
  5. Step 5: Solve for x
    x = 282,843,760.40/18,840.87
  6. Step 6: Final answer
    x = 15,012.25

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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.