Home / 3,135.42-4,327.72-1,955.78

Finding the Fourth Proportional to 3,135.42, 4,327.72 and 1,955.78

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Solution

The fourth proportional to 3,135.42, 4,327.72 and 1,955.78 is: 2,699.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,135.42 : 4,327.72 = 1,955.78 : x
  2. Step 2: Convert to fraction form
    3,135.42/4,327.72 = 1,955.78/x
  3. Step 3: Cross multiply
    3,135.42x = 4,327.72 × 1,955.78
  4. Step 4: Simplify right side
    3,135.42x = 8,464,068.22
  5. Step 5: Solve for x
    x = 8,464,068.22/3,135.42
  6. Step 6: Final answer
    x = 2,699.50

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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.