Home / 20,005.21-30,012.17-6,857.90

Finding the Fourth Proportional to 20,005.21, 30,012.17 and 6,857.90

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Solution

The fourth proportional to 20,005.21, 30,012.17 and 6,857.90 is: 10,288.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,005.21 : 30,012.17 = 6,857.90 : x
  2. Step 2: Convert to fraction form
    20,005.21/30,012.17 = 6,857.90/x
  3. Step 3: Cross multiply
    20,005.21x = 30,012.17 × 6,857.90
  4. Step 4: Simplify right side
    20,005.21x = 205,820,460.64
  5. Step 5: Solve for x
    x = 205,820,460.64/20,005.21
  6. Step 6: Final answer
    x = 10,288.34

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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.