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Finding the Fourth Proportional to 28,639, 39,521.84 and 16,063.75

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Solution

The fourth proportional to 28,639, 39,521.84 and 16,063.75 is: 22,167.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,639 : 39,521.84 = 16,063.75 : x
  2. Step 2: Convert to fraction form
    28,639/39,521.84 = 16,063.75/x
  3. Step 3: Cross multiply
    28,639x = 39,521.84 × 16,063.75
  4. Step 4: Simplify right side
    28,639x = 634,868,957.30
  5. Step 5: Solve for x
    x = 634,868,957.30/28,639
  6. Step 6: Final answer
    x = 22,167.99

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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.