Home / 18,947.34-28,429.20-10,172

Finding the Fourth Proportional to 18,947.34, 28,429.20 and 10,172

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Solution

The fourth proportional to 18,947.34, 28,429.20 and 10,172 is: 15,262.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,947.34 : 28,429.20 = 10,172 : x
  2. Step 2: Convert to fraction form
    18,947.34/28,429.20 = 10,172/x
  3. Step 3: Cross multiply
    18,947.34x = 28,429.20 × 10,172
  4. Step 4: Simplify right side
    18,947.34x = 289,181,822.40
  5. Step 5: Solve for x
    x = 289,181,822.40/18,947.34
  6. Step 6: Final answer
    x = 15,262.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.