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Finding the Fourth Proportional to 28,801, 39,745.38 and 15,553

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Solution

The fourth proportional to 28,801, 39,745.38 and 15,553 is: 21,463.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,801 : 39,745.38 = 15,553 : x
  2. Step 2: Convert to fraction form
    28,801/39,745.38 = 15,553/x
  3. Step 3: Cross multiply
    28,801x = 39,745.38 × 15,553
  4. Step 4: Simplify right side
    28,801x = 618,159,895.14
  5. Step 5: Solve for x
    x = 618,159,895.14/28,801
  6. Step 6: Final answer
    x = 21,463.14

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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.