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Finding the Fourth Proportional to 7,880.09, 10,879.59 and 4,899.98

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Solution

The fourth proportional to 7,880.09, 10,879.59 and 4,899.98 is: 6,765.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,880.09 : 10,879.59 = 4,899.98 : x
  2. Step 2: Convert to fraction form
    7,880.09/10,879.59 = 4,899.98/x
  3. Step 3: Cross multiply
    7,880.09x = 10,879.59 × 4,899.98
  4. Step 4: Simplify right side
    7,880.09x = 53,309,694.51
  5. Step 5: Solve for x
    x = 53,309,694.51/7,880.09
  6. Step 6: Final answer
    x = 6,765.11

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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.