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Finding the Fourth Proportional to 18,555.68, 25,607.04 and 10,172

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Solution

The fourth proportional to 18,555.68, 25,607.04 and 10,172 is: 14,037.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,555.68 : 25,607.04 = 10,172 : x
  2. Step 2: Convert to fraction form
    18,555.68/25,607.04 = 10,172/x
  3. Step 3: Cross multiply
    18,555.68x = 25,607.04 × 10,172
  4. Step 4: Simplify right side
    18,555.68x = 260,474,810.88
  5. Step 5: Solve for x
    x = 260,474,810.88/18,555.68
  6. Step 6: Final answer
    x = 14,037.47

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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.