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Finding the Fourth Proportional to 9,321.99, 13,987.85 and 3,779.43

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Solution

The fourth proportional to 9,321.99, 13,987.85 and 3,779.43 is: 5,671.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,321.99 : 13,987.85 = 3,779.43 : x
  2. Step 2: Convert to fraction form
    9,321.99/13,987.85 = 3,779.43/x
  3. Step 3: Cross multiply
    9,321.99x = 13,987.85 × 3,779.43
  4. Step 4: Simplify right side
    9,321.99x = 52,866,099.93
  5. Step 5: Solve for x
    x = 52,866,099.93/9,321.99
  6. Step 6: Final answer
    x = 5,671.12

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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.