Home / 20,780.65-28,676.91-11,706.04

Finding the Fourth Proportional to 20,780.65, 28,676.91 and 11,706.04

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Solution

The fourth proportional to 20,780.65, 28,676.91 and 11,706.04 is: 16,154.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780.65 : 28,676.91 = 11,706.04 : x
  2. Step 2: Convert to fraction form
    20,780.65/28,676.91 = 11,706.04/x
  3. Step 3: Cross multiply
    20,780.65x = 28,676.91 × 11,706.04
  4. Step 4: Simplify right side
    20,780.65x = 335,693,055.54
  5. Step 5: Solve for x
    x = 335,693,055.54/20,780.65
  6. Step 6: Final answer
    x = 16,154.12

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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.