Home / 13,800.97-20,690.52-12,860.56

Finding the Fourth Proportional to 13,800.97, 20,690.52 and 12,860.56

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Solution

The fourth proportional to 13,800.97, 20,690.52 and 12,860.56 is: 19,280.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,800.97 : 20,690.52 = 12,860.56 : x
  2. Step 2: Convert to fraction form
    13,800.97/20,690.52 = 12,860.56/x
  3. Step 3: Cross multiply
    13,800.97x = 20,690.52 × 12,860.56
  4. Step 4: Simplify right side
    13,800.97x = 266,091,673.89
  5. Step 5: Solve for x
    x = 266,091,673.89/13,800.97
  6. Step 6: Final answer
    x = 19,280.65

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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.