Home / 3,486.78-4,811.47-1,914.87

Finding the Fourth Proportional to 3,486.78, 4,811.47 and 1,914.87

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Solution

The fourth proportional to 3,486.78, 4,811.47 and 1,914.87 is: 2,642.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,486.78 : 4,811.47 = 1,914.87 : x
  2. Step 2: Convert to fraction form
    3,486.78/4,811.47 = 1,914.87/x
  3. Step 3: Cross multiply
    3,486.78x = 4,811.47 × 1,914.87
  4. Step 4: Simplify right side
    3,486.78x = 9,213,334.77
  5. Step 5: Solve for x
    x = 9,213,334.77/3,486.78
  6. Step 6: Final answer
    x = 2,642.36

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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.