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Finding the Fourth Proportional to 6,980.77, 9,623.50 and 4,990.60

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Solution

The fourth proportional to 6,980.77, 9,623.50 and 4,990.60 is: 6,879.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,980.77 : 9,623.50 = 4,990.60 : x
  2. Step 2: Convert to fraction form
    6,980.77/9,623.50 = 4,990.60/x
  3. Step 3: Cross multiply
    6,980.77x = 9,623.50 × 4,990.60
  4. Step 4: Simplify right side
    6,980.77x = 48,027,039.10
  5. Step 5: Solve for x
    x = 48,027,039.10/6,980.77
  6. Step 6: Final answer
    x = 6,879.91

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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.