Home / 8,721.08-13,081.60-2,147.36

Finding the Fourth Proportional to 8,721.08, 13,081.60 and 2,147.36

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Solution

The fourth proportional to 8,721.08, 13,081.60 and 2,147.36 is: 3,221.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,721.08 : 13,081.60 = 2,147.36 : x
  2. Step 2: Convert to fraction form
    8,721.08/13,081.60 = 2,147.36/x
  3. Step 3: Cross multiply
    8,721.08x = 13,081.60 × 2,147.36
  4. Step 4: Simplify right side
    8,721.08x = 28,090,904.58
  5. Step 5: Solve for x
    x = 28,090,904.58/8,721.08
  6. Step 6: Final answer
    x = 3,221.04

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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.