Home / 3,135.72-4,327.65-1,809.78

Finding the Fourth Proportional to 3,135.72, 4,327.65 and 1,809.78

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Solution

The fourth proportional to 3,135.72, 4,327.65 and 1,809.78 is: 2,497.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,135.72 : 4,327.65 = 1,809.78 : x
  2. Step 2: Convert to fraction form
    3,135.72/4,327.65 = 1,809.78/x
  3. Step 3: Cross multiply
    3,135.72x = 4,327.65 × 1,809.78
  4. Step 4: Simplify right side
    3,135.72x = 7,832,094.42
  5. Step 5: Solve for x
    x = 7,832,094.42/3,135.72
  6. Step 6: Final answer
    x = 2,497.70

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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.