Home / 13,920.02-20,879.76-3,531.50

Finding the Fourth Proportional to 13,920.02, 20,879.76 and 3,531.50

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Solution

The fourth proportional to 13,920.02, 20,879.76 and 3,531.50 is: 5,297.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,920.02 : 20,879.76 = 3,531.50 : x
  2. Step 2: Convert to fraction form
    13,920.02/20,879.76 = 3,531.50/x
  3. Step 3: Cross multiply
    13,920.02x = 20,879.76 × 3,531.50
  4. Step 4: Simplify right side
    13,920.02x = 73,736,872.44
  5. Step 5: Solve for x
    x = 73,736,872.44/13,920.02
  6. Step 6: Final answer
    x = 5,297.18

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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.