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Finding the Fourth Proportional to 28,915.94, 39,891.92 and 19,468.10

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Solution

The fourth proportional to 28,915.94, 39,891.92 and 19,468.10 is: 26,857.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,915.94 : 39,891.92 = 19,468.10 : x
  2. Step 2: Convert to fraction form
    28,915.94/39,891.92 = 19,468.10/x
  3. Step 3: Cross multiply
    28,915.94x = 39,891.92 × 19,468.10
  4. Step 4: Simplify right side
    28,915.94x = 776,619,590.95
  5. Step 5: Solve for x
    x = 776,619,590.95/28,915.94
  6. Step 6: Final answer
    x = 26,857.84

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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.