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Finding the Fourth Proportional to 12,670.76, 18,995.94 and 8,709.95

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Solution

The fourth proportional to 12,670.76, 18,995.94 and 8,709.95 is: 13,057.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,670.76 : 18,995.94 = 8,709.95 : x
  2. Step 2: Convert to fraction form
    12,670.76/18,995.94 = 8,709.95/x
  3. Step 3: Cross multiply
    12,670.76x = 18,995.94 × 8,709.95
  4. Step 4: Simplify right side
    12,670.76x = 165,453,735.09
  5. Step 5: Solve for x
    x = 165,453,735.09/12,670.76
  6. Step 6: Final answer
    x = 13,057.91

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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.