Home / 8,389.20-12,569.40-3,997.20

Finding the Fourth Proportional to 8,389.20, 12,569.40 and 3,997.20

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Solution

The fourth proportional to 8,389.20, 12,569.40 and 3,997.20 is: 5,988.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,389.20 : 12,569.40 = 3,997.20 : x
  2. Step 2: Convert to fraction form
    8,389.20/12,569.40 = 3,997.20/x
  3. Step 3: Cross multiply
    8,389.20x = 12,569.40 × 3,997.20
  4. Step 4: Simplify right side
    8,389.20x = 50,242,405.68
  5. Step 5: Solve for x
    x = 50,242,405.68/8,389.20
  6. Step 6: Final answer
    x = 5,988.94

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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.