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Finding the Fourth Proportional to 12,316.40, 18,474.60 and 12,186.80

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Solution

The fourth proportional to 12,316.40, 18,474.60 and 12,186.80 is: 18,280.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,316.40 : 18,474.60 = 12,186.80 : x
  2. Step 2: Convert to fraction form
    12,316.40/18,474.60 = 12,186.80/x
  3. Step 3: Cross multiply
    12,316.40x = 18,474.60 × 12,186.80
  4. Step 4: Simplify right side
    12,316.40x = 225,146,255.28
  5. Step 5: Solve for x
    x = 225,146,255.28/12,316.40
  6. Step 6: Final answer
    x = 18,280.20

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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.