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Finding the Fourth Proportional to 17,380.78, 23,985.35 and 9,827.09

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Solution

The fourth proportional to 17,380.78, 23,985.35 and 9,827.09 is: 13,561.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,380.78 : 23,985.35 = 9,827.09 : x
  2. Step 2: Convert to fraction form
    17,380.78/23,985.35 = 9,827.09/x
  3. Step 3: Cross multiply
    17,380.78x = 23,985.35 × 9,827.09
  4. Step 4: Simplify right side
    17,380.78x = 235,706,193.13
  5. Step 5: Solve for x
    x = 235,706,193.13/17,380.78
  6. Step 6: Final answer
    x = 13,561.31

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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.