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Finding the Fourth Proportional to 25,326, 34,949.88 and 15,390

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Solution

The fourth proportional to 25,326, 34,949.88 and 15,390 is: 21,238.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,326 : 34,949.88 = 15,390 : x
  2. Step 2: Convert to fraction form
    25,326/34,949.88 = 15,390/x
  3. Step 3: Cross multiply
    25,326x = 34,949.88 × 15,390
  4. Step 4: Simplify right side
    25,326x = 537,878,653.20
  5. Step 5: Solve for x
    x = 537,878,653.20/25,326
  6. Step 6: Final answer
    x = 21,238.20

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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.