Home / 3,126.80-4,314.36-1,729.28

Finding the Fourth Proportional to 3,126.80, 4,314.36 and 1,729.28

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Solution

The fourth proportional to 3,126.80, 4,314.36 and 1,729.28 is: 2,386.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,126.80 : 4,314.36 = 1,729.28 : x
  2. Step 2: Convert to fraction form
    3,126.80/4,314.36 = 1,729.28/x
  3. Step 3: Cross multiply
    3,126.80x = 4,314.36 × 1,729.28
  4. Step 4: Simplify right side
    3,126.80x = 7,460,736.46
  5. Step 5: Solve for x
    x = 7,460,736.46/3,126.80
  6. Step 6: Final answer
    x = 2,386.06

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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.