Home / 3,969.18-5,476.56-2,643.60

Finding the Fourth Proportional to 3,969.18, 5,476.56 and 2,643.60

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Solution

The fourth proportional to 3,969.18, 5,476.56 and 2,643.60 is: 3,647.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,969.18 : 5,476.56 = 2,643.60 : x
  2. Step 2: Convert to fraction form
    3,969.18/5,476.56 = 2,643.60/x
  3. Step 3: Cross multiply
    3,969.18x = 5,476.56 × 2,643.60
  4. Step 4: Simplify right side
    3,969.18x = 14,477,834.02
  5. Step 5: Solve for x
    x = 14,477,834.02/3,969.18
  6. Step 6: Final answer
    x = 3,647.56

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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.