Home / 20,486.12-28,271.13-11,993.54

Finding the Fourth Proportional to 20,486.12, 28,271.13 and 11,993.54

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Solution

The fourth proportional to 20,486.12, 28,271.13 and 11,993.54 is: 16,551.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,486.12 : 28,271.13 = 11,993.54 : x
  2. Step 2: Convert to fraction form
    20,486.12/28,271.13 = 11,993.54/x
  3. Step 3: Cross multiply
    20,486.12x = 28,271.13 × 11,993.54
  4. Step 4: Simplify right side
    20,486.12x = 339,070,928.50
  5. Step 5: Solve for x
    x = 339,070,928.50/20,486.12
  6. Step 6: Final answer
    x = 16,551.25

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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.