Home / 5,420.85-8,131.98-1,472.19

Finding the Fourth Proportional to 5,420.85, 8,131.98 and 1,472.19

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Solution

The fourth proportional to 5,420.85, 8,131.98 and 1,472.19 is: 2,208.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.85 : 8,131.98 = 1,472.19 : x
  2. Step 2: Convert to fraction form
    5,420.85/8,131.98 = 1,472.19/x
  3. Step 3: Cross multiply
    5,420.85x = 8,131.98 × 1,472.19
  4. Step 4: Simplify right side
    5,420.85x = 11,971,819.64
  5. Step 5: Solve for x
    x = 11,971,819.64/5,420.85
  6. Step 6: Final answer
    x = 2,208.48

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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.