Home / 3,172.72-4,378.18-1,756.34

Finding the Fourth Proportional to 3,172.72, 4,378.18 and 1,756.34

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Solution

The fourth proportional to 3,172.72, 4,378.18 and 1,756.34 is: 2,423.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,172.72 : 4,378.18 = 1,756.34 : x
  2. Step 2: Convert to fraction form
    3,172.72/4,378.18 = 1,756.34/x
  3. Step 3: Cross multiply
    3,172.72x = 4,378.18 × 1,756.34
  4. Step 4: Simplify right side
    3,172.72x = 7,689,572.66
  5. Step 5: Solve for x
    x = 7,689,572.66/3,172.72
  6. Step 6: Final answer
    x = 2,423.65

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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.