Home / 20,518.67-30,782.79-6,480.11

Finding the Fourth Proportional to 20,518.67, 30,782.79 and 6,480.11

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Solution

The fourth proportional to 20,518.67, 30,782.79 and 6,480.11 is: 9,721.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518.67 : 30,782.79 = 6,480.11 : x
  2. Step 2: Convert to fraction form
    20,518.67/30,782.79 = 6,480.11/x
  3. Step 3: Cross multiply
    20,518.67x = 30,782.79 × 6,480.11
  4. Step 4: Simplify right side
    20,518.67x = 199,475,711.39
  5. Step 5: Solve for x
    x = 199,475,711.39/20,518.67
  6. Step 6: Final answer
    x = 9,721.67

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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.