Home / 20,993.80-28,988.94-18,751.72

Finding the Fourth Proportional to 20,993.80, 28,988.94 and 18,751.72

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Solution

The fourth proportional to 20,993.80, 28,988.94 and 18,751.72 is: 25,893.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,993.80 : 28,988.94 = 18,751.72 : x
  2. Step 2: Convert to fraction form
    20,993.80/28,988.94 = 18,751.72/x
  3. Step 3: Cross multiply
    20,993.80x = 28,988.94 × 18,751.72
  4. Step 4: Simplify right side
    20,993.80x = 543,592,485.98
  5. Step 5: Solve for x
    x = 543,592,485.98/20,993.80
  6. Step 6: Final answer
    x = 25,893.00

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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.