Home / 3,128.30-4,686.15-1,954.70

Finding the Fourth Proportional to 3,128.30, 4,686.15 and 1,954.70

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Solution

The fourth proportional to 3,128.30, 4,686.15 and 1,954.70 is: 2,928.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.30 : 4,686.15 = 1,954.70 : x
  2. Step 2: Convert to fraction form
    3,128.30/4,686.15 = 1,954.70/x
  3. Step 3: Cross multiply
    3,128.30x = 4,686.15 × 1,954.70
  4. Step 4: Simplify right side
    3,128.30x = 9,160,017.41
  5. Step 5: Solve for x
    x = 9,160,017.41/3,128.30
  6. Step 6: Final answer
    x = 2,928.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.