Home / 7,920.18-11,879.46-4,989.60

Finding the Fourth Proportional to 7,920.18, 11,879.46 and 4,989.60

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Solution

The fourth proportional to 7,920.18, 11,879.46 and 4,989.60 is: 7,483.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,920.18 : 11,879.46 = 4,989.60 : x
  2. Step 2: Convert to fraction form
    7,920.18/11,879.46 = 4,989.60/x
  3. Step 3: Cross multiply
    7,920.18x = 11,879.46 × 4,989.60
  4. Step 4: Simplify right side
    7,920.18x = 59,273,753.62
  5. Step 5: Solve for x
    x = 59,273,753.62/7,920.18
  6. Step 6: Final answer
    x = 7,483.89

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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.