Home / 20,140.65-30,202.47-10,778.67

Finding the Fourth Proportional to 20,140.65, 30,202.47 and 10,778.67

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Solution

The fourth proportional to 20,140.65, 30,202.47 and 10,778.67 is: 16,163.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,140.65 : 30,202.47 = 10,778.67 : x
  2. Step 2: Convert to fraction form
    20,140.65/30,202.47 = 10,778.67/x
  3. Step 3: Cross multiply
    20,140.65x = 30,202.47 × 10,778.67
  4. Step 4: Simplify right side
    20,140.65x = 325,542,457.31
  5. Step 5: Solve for x
    x = 325,542,457.31/20,140.65
  6. Step 6: Final answer
    x = 16,163.45

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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.