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Finding the Fourth Proportional to 12,579.48, 18,840.06 and 12,142.08

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Solution

The fourth proportional to 12,579.48, 18,840.06 and 12,142.08 is: 18,184.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,579.48 : 18,840.06 = 12,142.08 : x
  2. Step 2: Convert to fraction form
    12,579.48/18,840.06 = 12,142.08/x
  3. Step 3: Cross multiply
    12,579.48x = 18,840.06 × 12,142.08
  4. Step 4: Simplify right side
    12,579.48x = 228,757,515.72
  5. Step 5: Solve for x
    x = 228,757,515.72/12,579.48
  6. Step 6: Final answer
    x = 18,184.97

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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.