Home / 20,684.14-31,014.50-18,920.87

Finding the Fourth Proportional to 20,684.14, 31,014.50 and 18,920.87

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Solution

The fourth proportional to 20,684.14, 31,014.50 and 18,920.87 is: 28,370.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,684.14 : 31,014.50 = 18,920.87 : x
  2. Step 2: Convert to fraction form
    20,684.14/31,014.50 = 18,920.87/x
  3. Step 3: Cross multiply
    20,684.14x = 31,014.50 × 18,920.87
  4. Step 4: Simplify right side
    20,684.14x = 586,821,189.24
  5. Step 5: Solve for x
    x = 586,821,189.24/20,684.14
  6. Step 6: Final answer
    x = 28,370.59

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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.