Home / 20,760.84-28,647.13-11,806.65

Finding the Fourth Proportional to 20,760.84, 28,647.13 and 11,806.65

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Solution

The fourth proportional to 20,760.84, 28,647.13 and 11,806.65 is: 16,291.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,760.84 : 28,647.13 = 11,806.65 : x
  2. Step 2: Convert to fraction form
    20,760.84/28,647.13 = 11,806.65/x
  3. Step 3: Cross multiply
    20,760.84x = 28,647.13 × 11,806.65
  4. Step 4: Simplify right side
    20,760.84x = 338,226,637.41
  5. Step 5: Solve for x
    x = 338,226,637.41/20,760.84
  6. Step 6: Final answer
    x = 16,291.57

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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.