Home / 5,421.19-8,129.48-1,722.43

Finding the Fourth Proportional to 5,421.19, 8,129.48 and 1,722.43

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Solution

The fourth proportional to 5,421.19, 8,129.48 and 1,722.43 is: 2,582.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,421.19 : 8,129.48 = 1,722.43 : x
  2. Step 2: Convert to fraction form
    5,421.19/8,129.48 = 1,722.43/x
  3. Step 3: Cross multiply
    5,421.19x = 8,129.48 × 1,722.43
  4. Step 4: Simplify right side
    5,421.19x = 14,002,410.98
  5. Step 5: Solve for x
    x = 14,002,410.98/5,421.19
  6. Step 6: Final answer
    x = 2,582.91

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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.