Home / 18,787.71-28,185.89-5,640.33

Finding the Fourth Proportional to 18,787.71, 28,185.89 and 5,640.33

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Solution

The fourth proportional to 18,787.71, 28,185.89 and 5,640.33 is: 8,461.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,787.71 : 28,185.89 = 5,640.33 : x
  2. Step 2: Convert to fraction form
    18,787.71/28,185.89 = 5,640.33/x
  3. Step 3: Cross multiply
    18,787.71x = 28,185.89 × 5,640.33
  4. Step 4: Simplify right side
    18,787.71x = 158,977,692.74
  5. Step 5: Solve for x
    x = 158,977,692.74/18,787.71
  6. Step 6: Final answer
    x = 8,461.79

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1.5x scale

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.