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Finding the Fourth Proportional to 18,114.60, 27,171.90 and 12,865.80

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Solution

The fourth proportional to 18,114.60, 27,171.90 and 12,865.80 is: 19,298.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,114.60 : 27,171.90 = 12,865.80 : x
  2. Step 2: Convert to fraction form
    18,114.60/27,171.90 = 12,865.80/x
  3. Step 3: Cross multiply
    18,114.60x = 27,171.90 × 12,865.80
  4. Step 4: Simplify right side
    18,114.60x = 349,588,231.02
  5. Step 5: Solve for x
    x = 349,588,231.02/18,114.60
  6. Step 6: Final answer
    x = 19,298.70

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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.