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Finding the Fourth Proportional to 12,385.56, 17,092 and 6,720.44

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Solution

The fourth proportional to 12,385.56, 17,092 and 6,720.44 is: 9,274.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,385.56 : 17,092 = 6,720.44 : x
  2. Step 2: Convert to fraction form
    12,385.56/17,092 = 6,720.44/x
  3. Step 3: Cross multiply
    12,385.56x = 17,092 × 6,720.44
  4. Step 4: Simplify right side
    12,385.56x = 114,865,760.48
  5. Step 5: Solve for x
    x = 114,865,760.48/12,385.56
  6. Step 6: Final answer
    x = 9,274.17

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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.