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Finding the Fourth Proportional to 6,661.99, 9,992.94 and 2,220

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Solution

The fourth proportional to 6,661.99, 9,992.94 and 2,220 is: 3,329.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,661.99 : 9,992.94 = 2,220 : x
  2. Step 2: Convert to fraction form
    6,661.99/9,992.94 = 2,220/x
  3. Step 3: Cross multiply
    6,661.99x = 9,992.94 × 2,220
  4. Step 4: Simplify right side
    6,661.99x = 22,184,326.80
  5. Step 5: Solve for x
    x = 22,184,326.80/6,661.99
  6. Step 6: Final answer
    x = 3,329.99

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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.