Home / 3,172.56-4,378.26-1,994.40

Finding the Fourth Proportional to 3,172.56, 4,378.26 and 1,994.40

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Solution

The fourth proportional to 3,172.56, 4,378.26 and 1,994.40 is: 2,752.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,172.56 : 4,378.26 = 1,994.40 : x
  2. Step 2: Convert to fraction form
    3,172.56/4,378.26 = 1,994.40/x
  3. Step 3: Cross multiply
    3,172.56x = 4,378.26 × 1,994.40
  4. Step 4: Simplify right side
    3,172.56x = 8,732,001.74
  5. Step 5: Solve for x
    x = 8,732,001.74/3,172.56
  6. Step 6: Final answer
    x = 2,752.35

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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.