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Finding the Fourth Proportional to 18,635.63, 25,717.63 and 10,138.23

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Solution

The fourth proportional to 18,635.63, 25,717.63 and 10,138.23 is: 13,991.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,635.63 : 25,717.63 = 10,138.23 : x
  2. Step 2: Convert to fraction form
    18,635.63/25,717.63 = 10,138.23/x
  3. Step 3: Cross multiply
    18,635.63x = 25,717.63 × 10,138.23
  4. Step 4: Simplify right side
    18,635.63x = 260,731,247.99
  5. Step 5: Solve for x
    x = 260,731,247.99/18,635.63
  6. Step 6: Final answer
    x = 13,991.01

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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.