Home / 20,719.70-31,083.60-8,873.45

Finding the Fourth Proportional to 20,719.70, 31,083.60 and 8,873.45

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Solution

The fourth proportional to 20,719.70, 31,083.60 and 8,873.45 is: 13,311.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,719.70 : 31,083.60 = 8,873.45 : x
  2. Step 2: Convert to fraction form
    20,719.70/31,083.60 = 8,873.45/x
  3. Step 3: Cross multiply
    20,719.70x = 31,083.60 × 8,873.45
  4. Step 4: Simplify right side
    20,719.70x = 275,818,770.42
  5. Step 5: Solve for x
    x = 275,818,770.42/20,719.70
  6. Step 6: Final answer
    x = 13,311.91

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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.