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Finding the Fourth Proportional to 7,919.99, 10,929.11 and 4,382.99

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Solution

The fourth proportional to 7,919.99, 10,929.11 and 4,382.99 is: 6,048.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,919.99 : 10,929.11 = 4,382.99 : x
  2. Step 2: Convert to fraction form
    7,919.99/10,929.11 = 4,382.99/x
  3. Step 3: Cross multiply
    7,919.99x = 10,929.11 × 4,382.99
  4. Step 4: Simplify right side
    7,919.99x = 47,902,103.28
  5. Step 5: Solve for x
    x = 47,902,103.28/7,919.99
  6. Step 6: Final answer
    x = 6,048.26

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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.