Home / 3,980.12-5,970.30-1,347.58

Finding the Fourth Proportional to 3,980.12, 5,970.30 and 1,347.58

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Solution

The fourth proportional to 3,980.12, 5,970.30 and 1,347.58 is: 2,021.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.12 : 5,970.30 = 1,347.58 : x
  2. Step 2: Convert to fraction form
    3,980.12/5,970.30 = 1,347.58/x
  3. Step 3: Cross multiply
    3,980.12x = 5,970.30 × 1,347.58
  4. Step 4: Simplify right side
    3,980.12x = 8,045,459.28
  5. Step 5: Solve for x
    x = 8,045,459.28/3,980.12
  6. Step 6: Final answer
    x = 2,021.41

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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.