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Finding the Fourth Proportional to 12,637.56, 18,933.64 and 7,440.60

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Solution

The fourth proportional to 12,637.56, 18,933.64 and 7,440.60 is: 11,147.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,637.56 : 18,933.64 = 7,440.60 : x
  2. Step 2: Convert to fraction form
    12,637.56/18,933.64 = 7,440.60/x
  3. Step 3: Cross multiply
    12,637.56x = 18,933.64 × 7,440.60
  4. Step 4: Simplify right side
    12,637.56x = 140,877,641.78
  5. Step 5: Solve for x
    x = 140,877,641.78/12,637.56
  6. Step 6: Final answer
    x = 11,147.53

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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.