Home / 20,740.81-28,626.96-13,185.67

Finding the Fourth Proportional to 20,740.81, 28,626.96 and 13,185.67

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Solution

The fourth proportional to 20,740.81, 28,626.96 and 13,185.67 is: 18,199.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,740.81 : 28,626.96 = 13,185.67 : x
  2. Step 2: Convert to fraction form
    20,740.81/28,626.96 = 13,185.67/x
  3. Step 3: Cross multiply
    20,740.81x = 28,626.96 × 13,185.67
  4. Step 4: Simplify right side
    20,740.81x = 377,465,647.66
  5. Step 5: Solve for x
    x = 377,465,647.66/20,740.81
  6. Step 6: Final answer
    x = 18,199.18

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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.