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Finding the Fourth Proportional to 12,664.76, 17,477.06 and 6,999.96

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Solution

The fourth proportional to 12,664.76, 17,477.06 and 6,999.96 is: 9,659.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,664.76 : 17,477.06 = 6,999.96 : x
  2. Step 2: Convert to fraction form
    12,664.76/17,477.06 = 6,999.96/x
  3. Step 3: Cross multiply
    12,664.76x = 17,477.06 × 6,999.96
  4. Step 4: Simplify right side
    12,664.76x = 122,338,720.92
  5. Step 5: Solve for x
    x = 122,338,720.92/12,664.76
  6. Step 6: Final answer
    x = 9,659.77

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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.