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Finding the Fourth Proportional to 18,615, 25,688.74 and 10,231.56

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Solution

The fourth proportional to 18,615, 25,688.74 and 10,231.56 is: 14,119.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,615 : 25,688.74 = 10,231.56 : x
  2. Step 2: Convert to fraction form
    18,615/25,688.74 = 10,231.56/x
  3. Step 3: Cross multiply
    18,615x = 25,688.74 × 10,231.56
  4. Step 4: Simplify right side
    18,615x = 262,835,884.63
  5. Step 5: Solve for x
    x = 262,835,884.63/18,615
  6. Step 6: Final answer
    x = 14,119.57

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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.