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Finding the Fourth Proportional to 8,899.99, 12,284.40 and 5,540.79

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Solution

The fourth proportional to 8,899.99, 12,284.40 and 5,540.79 is: 7,647.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,899.99 : 12,284.40 = 5,540.79 : x
  2. Step 2: Convert to fraction form
    8,899.99/12,284.40 = 5,540.79/x
  3. Step 3: Cross multiply
    8,899.99x = 12,284.40 × 5,540.79
  4. Step 4: Simplify right side
    8,899.99x = 68,065,280.68
  5. Step 5: Solve for x
    x = 68,065,280.68/8,899.99
  6. Step 6: Final answer
    x = 7,647.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.