Home / 20,661.50-31,104.67-18,824.42

Finding the Fourth Proportional to 20,661.50, 31,104.67 and 18,824.42

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Solution

The fourth proportional to 20,661.50, 31,104.67 and 18,824.42 is: 28,339.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,661.50 : 31,104.67 = 18,824.42 : x
  2. Step 2: Convert to fraction form
    20,661.50/31,104.67 = 18,824.42/x
  3. Step 3: Cross multiply
    20,661.50x = 31,104.67 × 18,824.42
  4. Step 4: Simplify right side
    20,661.50x = 585,527,372.04
  5. Step 5: Solve for x
    x = 585,527,372.04/20,661.50
  6. Step 6: Final answer
    x = 28,339.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.