Home / 3,980.20-5,970.90-2,031.34

Finding the Fourth Proportional to 3,980.20, 5,970.90 and 2,031.34

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Solution

The fourth proportional to 3,980.20, 5,970.90 and 2,031.34 is: 3,047.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.20 : 5,970.90 = 2,031.34 : x
  2. Step 2: Convert to fraction form
    3,980.20/5,970.90 = 2,031.34/x
  3. Step 3: Cross multiply
    3,980.20x = 5,970.90 × 2,031.34
  4. Step 4: Simplify right side
    3,980.20x = 12,128,928.01
  5. Step 5: Solve for x
    x = 12,128,928.01/3,980.20
  6. Step 6: Final answer
    x = 3,047.32

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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.