Home / 18,936.08-28,360.38-18,280

Finding the Fourth Proportional to 18,936.08, 28,360.38 and 18,280

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Solution

The fourth proportional to 18,936.08, 28,360.38 and 18,280 is: 27,377.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,936.08 : 28,360.38 = 18,280 : x
  2. Step 2: Convert to fraction form
    18,936.08/28,360.38 = 18,280/x
  3. Step 3: Cross multiply
    18,936.08x = 28,360.38 × 18,280
  4. Step 4: Simplify right side
    18,936.08x = 518,427,746.40
  5. Step 5: Solve for x
    x = 518,427,746.40/18,936.08
  6. Step 6: Final answer
    x = 27,377.78

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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.