Home / 20,376.05-28,120.23-11,301.80

Finding the Fourth Proportional to 20,376.05, 28,120.23 and 11,301.80

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Solution

The fourth proportional to 20,376.05, 28,120.23 and 11,301.80 is: 15,597.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,376.05 : 28,120.23 = 11,301.80 : x
  2. Step 2: Convert to fraction form
    20,376.05/28,120.23 = 11,301.80/x
  3. Step 3: Cross multiply
    20,376.05x = 28,120.23 × 11,301.80
  4. Step 4: Simplify right side
    20,376.05x = 317,809,074.81
  5. Step 5: Solve for x
    x = 317,809,074.81/20,376.05
  6. Step 6: Final answer
    x = 15,597.19

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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.