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Finding the Fourth Proportional to 5,401.80, 8,109.90 and 3,457.80

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Solution

The fourth proportional to 5,401.80, 8,109.90 and 3,457.80 is: 5,191.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,401.80 : 8,109.90 = 3,457.80 : x
  2. Step 2: Convert to fraction form
    5,401.80/8,109.90 = 3,457.80/x
  3. Step 3: Cross multiply
    5,401.80x = 8,109.90 × 3,457.80
  4. Step 4: Simplify right side
    5,401.80x = 28,042,412.22
  5. Step 5: Solve for x
    x = 28,042,412.22/5,401.80
  6. Step 6: Final answer
    x = 5,191.31

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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.