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Finding the Fourth Proportional to 18,129.96, 25,015.08 and 10,571.76

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Solution

The fourth proportional to 18,129.96, 25,015.08 and 10,571.76 is: 14,586.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,129.96 : 25,015.08 = 10,571.76 : x
  2. Step 2: Convert to fraction form
    18,129.96/25,015.08 = 10,571.76/x
  3. Step 3: Cross multiply
    18,129.96x = 25,015.08 × 10,571.76
  4. Step 4: Simplify right side
    18,129.96x = 264,453,422.14
  5. Step 5: Solve for x
    x = 264,453,422.14/18,129.96
  6. Step 6: Final answer
    x = 14,586.54

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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.