Home / 13,106.25-19,640.21-8,160.84

Finding the Fourth Proportional to 13,106.25, 19,640.21 and 8,160.84

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Solution

The fourth proportional to 13,106.25, 19,640.21 and 8,160.84 is: 12,229.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,106.25 : 19,640.21 = 8,160.84 : x
  2. Step 2: Convert to fraction form
    13,106.25/19,640.21 = 8,160.84/x
  3. Step 3: Cross multiply
    13,106.25x = 19,640.21 × 8,160.84
  4. Step 4: Simplify right side
    13,106.25x = 160,280,570.57
  5. Step 5: Solve for x
    x = 160,280,570.57/13,106.25
  6. Step 6: Final answer
    x = 12,229.32

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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.