Home / 18,969.57-28,450.29-5,639.35

Finding the Fourth Proportional to 18,969.57, 28,450.29 and 5,639.35

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Solution

The fourth proportional to 18,969.57, 28,450.29 and 5,639.35 is: 8,457.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,969.57 : 28,450.29 = 5,639.35 : x
  2. Step 2: Convert to fraction form
    18,969.57/28,450.29 = 5,639.35/x
  3. Step 3: Cross multiply
    18,969.57x = 28,450.29 × 5,639.35
  4. Step 4: Simplify right side
    18,969.57x = 160,441,034.54
  5. Step 5: Solve for x
    x = 160,441,034.54/18,969.57
  6. Step 6: Final answer
    x = 8,457.81

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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.