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Finding the Fourth Proportional to 9,879.40, 14,829.90 and 6,185.80

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Solution

The fourth proportional to 9,879.40, 14,829.90 and 6,185.80 is: 9,285.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,879.40 : 14,829.90 = 6,185.80 : x
  2. Step 2: Convert to fraction form
    9,879.40/14,829.90 = 6,185.80/x
  3. Step 3: Cross multiply
    9,879.40x = 14,829.90 × 6,185.80
  4. Step 4: Simplify right side
    9,879.40x = 91,734,795.42
  5. Step 5: Solve for x
    x = 91,734,795.42/9,879.40
  6. Step 6: Final answer
    x = 9,285.46

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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.