Home / 3,990.40-5,506.53-2,197.53

Finding the Fourth Proportional to 3,990.40, 5,506.53 and 2,197.53

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Solution

The fourth proportional to 3,990.40, 5,506.53 and 2,197.53 is: 3,032.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.40 : 5,506.53 = 2,197.53 : x
  2. Step 2: Convert to fraction form
    3,990.40/5,506.53 = 2,197.53/x
  3. Step 3: Cross multiply
    3,990.40x = 5,506.53 × 2,197.53
  4. Step 4: Simplify right side
    3,990.40x = 12,100,756.63
  5. Step 5: Solve for x
    x = 12,100,756.63/3,990.40
  6. Step 6: Final answer
    x = 3,032.47

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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.