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Finding the Fourth Proportional to 12,016.70, 18,012.90 and 5,447.60

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Solution

The fourth proportional to 12,016.70, 18,012.90 and 5,447.60 is: 8,165.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,016.70 : 18,012.90 = 5,447.60 : x
  2. Step 2: Convert to fraction form
    12,016.70/18,012.90 = 5,447.60/x
  3. Step 3: Cross multiply
    12,016.70x = 18,012.90 × 5,447.60
  4. Step 4: Simplify right side
    12,016.70x = 98,127,074.04
  5. Step 5: Solve for x
    x = 98,127,074.04/12,016.70
  6. Step 6: Final answer
    x = 8,165.89

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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.