Home / 12,655.98-18,986.13-3,890.70

Finding the Fourth Proportional to 12,655.98, 18,986.13 and 3,890.70

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Solution

The fourth proportional to 12,655.98, 18,986.13 and 3,890.70 is: 5,836.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,655.98 : 18,986.13 = 3,890.70 : x
  2. Step 2: Convert to fraction form
    12,655.98/18,986.13 = 3,890.70/x
  3. Step 3: Cross multiply
    12,655.98x = 18,986.13 × 3,890.70
  4. Step 4: Simplify right side
    12,655.98x = 73,869,335.99
  5. Step 5: Solve for x
    x = 73,869,335.99/12,655.98
  6. Step 6: Final answer
    x = 5,836.71

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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.