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Finding the Fourth Proportional to 12,312.88, 16,991.79 and 6,723.88

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Solution

The fourth proportional to 12,312.88, 16,991.79 and 6,723.88 is: 9,278.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,312.88 : 16,991.79 = 6,723.88 : x
  2. Step 2: Convert to fraction form
    12,312.88/16,991.79 = 6,723.88/x
  3. Step 3: Cross multiply
    12,312.88x = 16,991.79 × 6,723.88
  4. Step 4: Simplify right side
    12,312.88x = 114,250,756.95
  5. Step 5: Solve for x
    x = 114,250,756.95/12,312.88
  6. Step 6: Final answer
    x = 9,278.96

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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.