Home / 3,991.95-5,509.06-2,223.55

Finding the Fourth Proportional to 3,991.95, 5,509.06 and 2,223.55

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Solution

The fourth proportional to 3,991.95, 5,509.06 and 2,223.55 is: 3,068.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.95 : 5,509.06 = 2,223.55 : x
  2. Step 2: Convert to fraction form
    3,991.95/5,509.06 = 2,223.55/x
  3. Step 3: Cross multiply
    3,991.95x = 5,509.06 × 2,223.55
  4. Step 4: Simplify right side
    3,991.95x = 12,249,685.46
  5. Step 5: Solve for x
    x = 12,249,685.46/3,991.95
  6. Step 6: Final answer
    x = 3,068.60

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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.