Home / 5,420.60-8,129.68-1,722.16

Finding the Fourth Proportional to 5,420.60, 8,129.68 and 1,722.16

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Solution

The fourth proportional to 5,420.60, 8,129.68 and 1,722.16 is: 2,582.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.60 : 8,129.68 = 1,722.16 : x
  2. Step 2: Convert to fraction form
    5,420.60/8,129.68 = 1,722.16/x
  3. Step 3: Cross multiply
    5,420.60x = 8,129.68 × 1,722.16
  4. Step 4: Simplify right side
    5,420.60x = 14,000,609.71
  5. Step 5: Solve for x
    x = 14,000,609.71/5,420.60
  6. Step 6: Final answer
    x = 2,582.85

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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.