Home / 31,014.60-42,786.33-20,668.67

Finding the Fourth Proportional to 31,014.60, 42,786.33 and 20,668.67

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Solution

The fourth proportional to 31,014.60, 42,786.33 and 20,668.67 is: 28,513.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,014.60 : 42,786.33 = 20,668.67 : x
  2. Step 2: Convert to fraction form
    31,014.60/42,786.33 = 20,668.67/x
  3. Step 3: Cross multiply
    31,014.60x = 42,786.33 × 20,668.67
  4. Step 4: Simplify right side
    31,014.60x = 884,336,404.29
  5. Step 5: Solve for x
    x = 884,336,404.29/31,014.60
  6. Step 6: Final answer
    x = 28,513.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.