Home / 28,678.71-43,020.78-11,149.89

Finding the Fourth Proportional to 28,678.71, 43,020.78 and 11,149.89

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Solution

The fourth proportional to 28,678.71, 43,020.78 and 11,149.89 is: 16,725.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,678.71 : 43,020.78 = 11,149.89 : x
  2. Step 2: Convert to fraction form
    28,678.71/43,020.78 = 11,149.89/x
  3. Step 3: Cross multiply
    28,678.71x = 43,020.78 × 11,149.89
  4. Step 4: Simplify right side
    28,678.71x = 479,676,964.71
  5. Step 5: Solve for x
    x = 479,676,964.71/28,678.71
  6. Step 6: Final answer
    x = 16,725.89

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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.