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Finding the Fourth Proportional to 18,365.40, 27,548.10 and 13,181.40

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Solution

The fourth proportional to 18,365.40, 27,548.10 and 13,181.40 is: 19,772.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,365.40 : 27,548.10 = 13,181.40 : x
  2. Step 2: Convert to fraction form
    18,365.40/27,548.10 = 13,181.40/x
  3. Step 3: Cross multiply
    18,365.40x = 27,548.10 × 13,181.40
  4. Step 4: Simplify right side
    18,365.40x = 363,122,525.34
  5. Step 5: Solve for x
    x = 363,122,525.34/18,365.40
  6. Step 6: Final answer
    x = 19,772.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.