Home / 20,816.90-31,218.29-6,773.46

Finding the Fourth Proportional to 20,816.90, 31,218.29 and 6,773.46

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Solution

The fourth proportional to 20,816.90, 31,218.29 and 6,773.46 is: 10,157.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.90 : 31,218.29 = 6,773.46 : x
  2. Step 2: Convert to fraction form
    20,816.90/31,218.29 = 6,773.46/x
  3. Step 3: Cross multiply
    20,816.90x = 31,218.29 × 6,773.46
  4. Step 4: Simplify right side
    20,816.90x = 211,455,682.49
  5. Step 5: Solve for x
    x = 211,455,682.49/20,816.90
  6. Step 6: Final answer
    x = 10,157.89

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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.