Home / 20,856.16-31,289.10-6,816.84

Finding the Fourth Proportional to 20,856.16, 31,289.10 and 6,816.84

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Solution

The fourth proportional to 20,856.16, 31,289.10 and 6,816.84 is: 10,226.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,856.16 : 31,289.10 = 6,816.84 : x
  2. Step 2: Convert to fraction form
    20,856.16/31,289.10 = 6,816.84/x
  3. Step 3: Cross multiply
    20,856.16x = 31,289.10 × 6,816.84
  4. Step 4: Simplify right side
    20,856.16x = 213,292,788.44
  5. Step 5: Solve for x
    x = 213,292,788.44/20,856.16
  6. Step 6: Final answer
    x = 10,226.85

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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.