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Finding the Fourth Proportional to 12,066.80, 18,085.80 and 6,220.40

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Solution

The fourth proportional to 12,066.80, 18,085.80 and 6,220.40 is: 9,323.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,066.80 : 18,085.80 = 6,220.40 : x
  2. Step 2: Convert to fraction form
    12,066.80/18,085.80 = 6,220.40/x
  3. Step 3: Cross multiply
    12,066.80x = 18,085.80 × 6,220.40
  4. Step 4: Simplify right side
    12,066.80x = 112,500,910.32
  5. Step 5: Solve for x
    x = 112,500,910.32/12,066.80
  6. Step 6: Final answer
    x = 9,323.18

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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.