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Finding the Fourth Proportional to 3,889.86, 5,809.99 and 3,519.09

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Solution

The fourth proportional to 3,889.86, 5,809.99 and 3,519.09 is: 5,256.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.86 : 5,809.99 = 3,519.09 : x
  2. Step 2: Convert to fraction form
    3,889.86/5,809.99 = 3,519.09/x
  3. Step 3: Cross multiply
    3,889.86x = 5,809.99 × 3,519.09
  4. Step 4: Simplify right side
    3,889.86x = 20,445,877.71
  5. Step 5: Solve for x
    x = 20,445,877.71/3,889.86
  6. Step 6: Final answer
    x = 5,256.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.