Home / 13,928.95-20,911.97-8,089.75

Finding the Fourth Proportional to 13,928.95, 20,911.97 and 8,089.75

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Solution

The fourth proportional to 13,928.95, 20,911.97 and 8,089.75 is: 12,145.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,928.95 : 20,911.97 = 8,089.75 : x
  2. Step 2: Convert to fraction form
    13,928.95/20,911.97 = 8,089.75/x
  3. Step 3: Cross multiply
    13,928.95x = 20,911.97 × 8,089.75
  4. Step 4: Simplify right side
    13,928.95x = 169,172,609.31
  5. Step 5: Solve for x
    x = 169,172,609.31/13,928.95
  6. Step 6: Final answer
    x = 12,145.40

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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.