Home / 12,720.60-19,091.70-5,711.40

Finding the Fourth Proportional to 12,720.60, 19,091.70 and 5,711.40

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Solution

The fourth proportional to 12,720.60, 19,091.70 and 5,711.40 is: 8,571.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,720.60 : 19,091.70 = 5,711.40 : x
  2. Step 2: Convert to fraction form
    12,720.60/19,091.70 = 5,711.40/x
  3. Step 3: Cross multiply
    12,720.60x = 19,091.70 × 5,711.40
  4. Step 4: Simplify right side
    12,720.60x = 109,040,335.38
  5. Step 5: Solve for x
    x = 109,040,335.38/12,720.60
  6. Step 6: Final answer
    x = 8,571.95

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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.