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Finding the Fourth Proportional to 12,455.52, 17,187.84 and 6,866.64

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Solution

The fourth proportional to 12,455.52, 17,187.84 and 6,866.64 is: 9,475.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,455.52 : 17,187.84 = 6,866.64 : x
  2. Step 2: Convert to fraction form
    12,455.52/17,187.84 = 6,866.64/x
  3. Step 3: Cross multiply
    12,455.52x = 17,187.84 × 6,866.64
  4. Step 4: Simplify right side
    12,455.52x = 118,022,709.66
  5. Step 5: Solve for x
    x = 118,022,709.66/12,455.52
  6. Step 6: Final answer
    x = 9,475.53

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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.