Home / 20,665.10-30,997.65-6,812.30

Finding the Fourth Proportional to 20,665.10, 30,997.65 and 6,812.30

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Solution

The fourth proportional to 20,665.10, 30,997.65 and 6,812.30 is: 10,218.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,665.10 : 30,997.65 = 6,812.30 : x
  2. Step 2: Convert to fraction form
    20,665.10/30,997.65 = 6,812.30/x
  3. Step 3: Cross multiply
    20,665.10x = 30,997.65 × 6,812.30
  4. Step 4: Simplify right side
    20,665.10x = 211,165,291.10
  5. Step 5: Solve for x
    x = 211,165,291.10/20,665.10
  6. Step 6: Final answer
    x = 10,218.45

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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.