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Finding the Fourth Proportional to 12,865.68, 17,744.40 and 8,885.88

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Solution

The fourth proportional to 12,865.68, 17,744.40 and 8,885.88 is: 12,255.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,865.68 : 17,744.40 = 8,885.88 : x
  2. Step 2: Convert to fraction form
    12,865.68/17,744.40 = 8,885.88/x
  3. Step 3: Cross multiply
    12,865.68x = 17,744.40 × 8,885.88
  4. Step 4: Simplify right side
    12,865.68x = 157,674,609.07
  5. Step 5: Solve for x
    x = 157,674,609.07/12,865.68
  6. Step 6: Final answer
    x = 12,255.44

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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.