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Finding the Fourth Proportional to 5,623.90, 8,429.01 and 3,980.92

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Solution

The fourth proportional to 5,623.90, 8,429.01 and 3,980.92 is: 5,966.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,623.90 : 8,429.01 = 3,980.92 : x
  2. Step 2: Convert to fraction form
    5,623.90/8,429.01 = 3,980.92/x
  3. Step 3: Cross multiply
    5,623.90x = 8,429.01 × 3,980.92
  4. Step 4: Simplify right side
    5,623.90x = 33,555,214.49
  5. Step 5: Solve for x
    x = 33,555,214.49/5,623.90
  6. Step 6: Final answer
    x = 5,966.54

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1.5x scale

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.