Home / 5,161.80-7,123.20-2,803.98

Finding the Fourth Proportional to 5,161.80, 7,123.20 and 2,803.98

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Solution

The fourth proportional to 5,161.80, 7,123.20 and 2,803.98 is: 3,869.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,161.80 : 7,123.20 = 2,803.98 : x
  2. Step 2: Convert to fraction form
    5,161.80/7,123.20 = 2,803.98/x
  3. Step 3: Cross multiply
    5,161.80x = 7,123.20 × 2,803.98
  4. Step 4: Simplify right side
    5,161.80x = 19,973,310.34
  5. Step 5: Solve for x
    x = 19,973,310.34/5,161.80
  6. Step 6: Final answer
    x = 3,869.45

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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.