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Finding the Fourth Proportional to 12,157.88, 18,237.96 and 3,392.87

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Solution

The fourth proportional to 12,157.88, 18,237.96 and 3,392.87 is: 5,089.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,157.88 : 18,237.96 = 3,392.87 : x
  2. Step 2: Convert to fraction form
    12,157.88/18,237.96 = 3,392.87/x
  3. Step 3: Cross multiply
    12,157.88x = 18,237.96 × 3,392.87
  4. Step 4: Simplify right side
    12,157.88x = 61,878,936.16
  5. Step 5: Solve for x
    x = 61,878,936.16/12,157.88
  6. Step 6: Final answer
    x = 5,089.62

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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.