Home / 28,360.31-42,546.80-8,640.41

Finding the Fourth Proportional to 28,360.31, 42,546.80 and 8,640.41

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Solution

The fourth proportional to 28,360.31, 42,546.80 and 8,640.41 is: 12,962.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,360.31 : 42,546.80 = 8,640.41 : x
  2. Step 2: Convert to fraction form
    28,360.31/42,546.80 = 8,640.41/x
  3. Step 3: Cross multiply
    28,360.31x = 42,546.80 × 8,640.41
  4. Step 4: Simplify right side
    28,360.31x = 367,621,540.25
  5. Step 5: Solve for x
    x = 367,621,540.25/28,360.31
  6. Step 6: Final answer
    x = 12,962.54

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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.