Home / 3,121.02-4,312.71-2,969.19

Finding the Fourth Proportional to 3,121.02, 4,312.71 and 2,969.19

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Solution

The fourth proportional to 3,121.02, 4,312.71 and 2,969.19 is: 4,102.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.02 : 4,312.71 = 2,969.19 : x
  2. Step 2: Convert to fraction form
    3,121.02/4,312.71 = 2,969.19/x
  3. Step 3: Cross multiply
    3,121.02x = 4,312.71 × 2,969.19
  4. Step 4: Simplify right side
    3,121.02x = 12,805,255.40
  5. Step 5: Solve for x
    x = 12,805,255.40/3,121.02
  6. Step 6: Final answer
    x = 4,102.91

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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.