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Finding the Fourth Proportional to 28,141.65, 38,830.59 and 16,815.69

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Solution

The fourth proportional to 28,141.65, 38,830.59 and 16,815.69 is: 23,202.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,141.65 : 38,830.59 = 16,815.69 : x
  2. Step 2: Convert to fraction form
    28,141.65/38,830.59 = 16,815.69/x
  3. Step 3: Cross multiply
    28,141.65x = 38,830.59 × 16,815.69
  4. Step 4: Simplify right side
    28,141.65x = 652,963,163.96
  5. Step 5: Solve for x
    x = 652,963,163.96/28,141.65
  6. Step 6: Final answer
    x = 23,202.73

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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.