Home / 20,816.10-31,220.91-6,776.37

Finding the Fourth Proportional to 20,816.10, 31,220.91 and 6,776.37

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Solution

The fourth proportional to 20,816.10, 31,220.91 and 6,776.37 is: 10,163.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.10 : 31,220.91 = 6,776.37 : x
  2. Step 2: Convert to fraction form
    20,816.10/31,220.91 = 6,776.37/x
  3. Step 3: Cross multiply
    20,816.10x = 31,220.91 × 6,776.37
  4. Step 4: Simplify right side
    20,816.10x = 211,564,437.90
  5. Step 5: Solve for x
    x = 211,564,437.90/20,816.10
  6. Step 6: Final answer
    x = 10,163.50

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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.