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Finding the Fourth Proportional to 18,968.58, 28,445.58 and 13,107.42

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Solution

The fourth proportional to 18,968.58, 28,445.58 and 13,107.42 is: 19,656.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,968.58 : 28,445.58 = 13,107.42 : x
  2. Step 2: Convert to fraction form
    18,968.58/28,445.58 = 13,107.42/x
  3. Step 3: Cross multiply
    18,968.58x = 28,445.58 × 13,107.42
  4. Step 4: Simplify right side
    18,968.58x = 372,848,164.20
  5. Step 5: Solve for x
    x = 372,848,164.20/18,968.58
  6. Step 6: Final answer
    x = 19,656.09

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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.