Home / 5,211.72-7,192.65-2,854.21

Finding the Fourth Proportional to 5,211.72, 7,192.65 and 2,854.21

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Solution

The fourth proportional to 5,211.72, 7,192.65 and 2,854.21 is: 3,939.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,211.72 : 7,192.65 = 2,854.21 : x
  2. Step 2: Convert to fraction form
    5,211.72/7,192.65 = 2,854.21/x
  3. Step 3: Cross multiply
    5,211.72x = 7,192.65 × 2,854.21
  4. Step 4: Simplify right side
    5,211.72x = 20,529,333.56
  5. Step 5: Solve for x
    x = 20,529,333.56/5,211.72
  6. Step 6: Final answer
    x = 3,939.07

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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.