Home / 5,621.70-8,423.31-1,921.91

Finding the Fourth Proportional to 5,621.70, 8,423.31 and 1,921.91

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Solution

The fourth proportional to 5,621.70, 8,423.31 and 1,921.91 is: 2,879.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,621.70 : 8,423.31 = 1,921.91 : x
  2. Step 2: Convert to fraction form
    5,621.70/8,423.31 = 1,921.91/x
  3. Step 3: Cross multiply
    5,621.70x = 8,423.31 × 1,921.91
  4. Step 4: Simplify right side
    5,621.70x = 16,188,808.81
  5. Step 5: Solve for x
    x = 16,188,808.81/5,621.70
  6. Step 6: Final answer
    x = 2,879.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.