Home / 3,128.18-4,316.21-1,994.28

Finding the Fourth Proportional to 3,128.18, 4,316.21 and 1,994.28

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Solution

The fourth proportional to 3,128.18, 4,316.21 and 1,994.28 is: 2,751.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.18 : 4,316.21 = 1,994.28 : x
  2. Step 2: Convert to fraction form
    3,128.18/4,316.21 = 1,994.28/x
  3. Step 3: Cross multiply
    3,128.18x = 4,316.21 × 1,994.28
  4. Step 4: Simplify right side
    3,128.18x = 8,607,731.28
  5. Step 5: Solve for x
    x = 8,607,731.28/3,128.18
  6. Step 6: Final answer
    x = 2,751.67

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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.