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Finding the Fourth Proportional to 12,485.72, 17,229.53 and 6,819.32

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Solution

The fourth proportional to 12,485.72, 17,229.53 and 6,819.32 is: 9,410.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,485.72 : 17,229.53 = 6,819.32 : x
  2. Step 2: Convert to fraction form
    12,485.72/17,229.53 = 6,819.32/x
  3. Step 3: Cross multiply
    12,485.72x = 17,229.53 × 6,819.32
  4. Step 4: Simplify right side
    12,485.72x = 117,493,558.28
  5. Step 5: Solve for x
    x = 117,493,558.28/12,485.72
  6. Step 6: Final answer
    x = 9,410.24

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.