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Finding the Fourth Proportional to 30,396.78, 45,563.58 and 12,637.08

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Solution

The fourth proportional to 30,396.78, 45,563.58 and 12,637.08 is: 18,942.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,396.78 : 45,563.58 = 12,637.08 : x
  2. Step 2: Convert to fraction form
    30,396.78/45,563.58 = 12,637.08/x
  3. Step 3: Cross multiply
    30,396.78x = 45,563.58 × 12,637.08
  4. Step 4: Simplify right side
    30,396.78x = 575,790,605.55
  5. Step 5: Solve for x
    x = 575,790,605.55/30,396.78
  6. Step 6: Final answer
    x = 18,942.49

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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.