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Finding the Fourth Proportional to 12,493.31, 17,222.97 and 8,509.32

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Solution

The fourth proportional to 12,493.31, 17,222.97 and 8,509.32 is: 11,730.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,493.31 : 17,222.97 = 8,509.32 : x
  2. Step 2: Convert to fraction form
    12,493.31/17,222.97 = 8,509.32/x
  3. Step 3: Cross multiply
    12,493.31x = 17,222.97 × 8,509.32
  4. Step 4: Simplify right side
    12,493.31x = 146,555,763.08
  5. Step 5: Solve for x
    x = 146,555,763.08/12,493.31
  6. Step 6: Final answer
    x = 11,730.74

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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.