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Finding the Fourth Proportional to 13,486.78, 18,604.83 and 9,009.10

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Solution

The fourth proportional to 13,486.78, 18,604.83 and 9,009.10 is: 12,427.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,486.78 : 18,604.83 = 9,009.10 : x
  2. Step 2: Convert to fraction form
    13,486.78/18,604.83 = 9,009.10/x
  3. Step 3: Cross multiply
    13,486.78x = 18,604.83 × 9,009.10
  4. Step 4: Simplify right side
    13,486.78x = 167,612,773.95
  5. Step 5: Solve for x
    x = 167,612,773.95/13,486.78
  6. Step 6: Final answer
    x = 12,427.93

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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.