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Finding the Fourth Proportional to 18,230.40, 27,280.80 and 12,657.60

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Solution

The fourth proportional to 18,230.40, 27,280.80 and 12,657.60 is: 18,941.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,230.40 : 27,280.80 = 12,657.60 : x
  2. Step 2: Convert to fraction form
    18,230.40/27,280.80 = 12,657.60/x
  3. Step 3: Cross multiply
    18,230.40x = 27,280.80 × 12,657.60
  4. Step 4: Simplify right side
    18,230.40x = 345,309,454.08
  5. Step 5: Solve for x
    x = 345,309,454.08/18,230.40
  6. Step 6: Final answer
    x = 18,941.41

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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.