Home / 20,969.74-28,938.22-12,016.81

Finding the Fourth Proportional to 20,969.74, 28,938.22 and 12,016.81

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Solution

The fourth proportional to 20,969.74, 28,938.22 and 12,016.81 is: 16,583.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,969.74 : 28,938.22 = 12,016.81 : x
  2. Step 2: Convert to fraction form
    20,969.74/28,938.22 = 12,016.81/x
  3. Step 3: Cross multiply
    20,969.74x = 28,938.22 × 12,016.81
  4. Step 4: Simplify right side
    20,969.74x = 347,745,091.48
  5. Step 5: Solve for x
    x = 347,745,091.48/20,969.74
  6. Step 6: Final answer
    x = 16,583.19

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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.