Home / 5,621.79-8,430.50-2,109.89

Finding the Fourth Proportional to 5,621.79, 8,430.50 and 2,109.89

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Solution

The fourth proportional to 5,621.79, 8,430.50 and 2,109.89 is: 3,164.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,621.79 : 8,430.50 = 2,109.89 : x
  2. Step 2: Convert to fraction form
    5,621.79/8,430.50 = 2,109.89/x
  3. Step 3: Cross multiply
    5,621.79x = 8,430.50 × 2,109.89
  4. Step 4: Simplify right side
    5,621.79x = 17,787,427.65
  5. Step 5: Solve for x
    x = 17,787,427.65/5,621.79
  6. Step 6: Final answer
    x = 3,164.01

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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.