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Finding the Fourth Proportional to 28,476.65, 39,291.12 and 16,532.79

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Solution

The fourth proportional to 28,476.65, 39,291.12 and 16,532.79 is: 22,811.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,476.65 : 39,291.12 = 16,532.79 : x
  2. Step 2: Convert to fraction form
    28,476.65/39,291.12 = 16,532.79/x
  3. Step 3: Cross multiply
    28,476.65x = 39,291.12 × 16,532.79
  4. Step 4: Simplify right side
    28,476.65x = 649,591,835.82
  5. Step 5: Solve for x
    x = 649,591,835.82/28,476.65
  6. Step 6: Final answer
    x = 22,811.39

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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.