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Finding the Fourth Proportional to 12,281.80, 18,430.80 and 7,016.80

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Solution

The fourth proportional to 12,281.80, 18,430.80 and 7,016.80 is: 10,529.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,281.80 : 18,430.80 = 7,016.80 : x
  2. Step 2: Convert to fraction form
    12,281.80/18,430.80 = 7,016.80/x
  3. Step 3: Cross multiply
    12,281.80x = 18,430.80 × 7,016.80
  4. Step 4: Simplify right side
    12,281.80x = 129,325,237.44
  5. Step 5: Solve for x
    x = 129,325,237.44/12,281.80
  6. Step 6: Final answer
    x = 10,529.83

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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.