Home / 20,639.04-28,471.44-13,072.68

Finding the Fourth Proportional to 20,639.04, 28,471.44 and 13,072.68

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Solution

The fourth proportional to 20,639.04, 28,471.44 and 13,072.68 is: 18,033.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.04 : 28,471.44 = 13,072.68 : x
  2. Step 2: Convert to fraction form
    20,639.04/28,471.44 = 13,072.68/x
  3. Step 3: Cross multiply
    20,639.04x = 28,471.44 × 13,072.68
  4. Step 4: Simplify right side
    20,639.04x = 372,198,024.26
  5. Step 5: Solve for x
    x = 372,198,024.26/20,639.04
  6. Step 6: Final answer
    x = 18,033.69

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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.