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Finding the Fourth Proportional to 28,223.52, 38,948 and 15,648

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Solution

The fourth proportional to 28,223.52, 38,948 and 15,648 is: 21,593.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,223.52 : 38,948 = 15,648 : x
  2. Step 2: Convert to fraction form
    28,223.52/38,948 = 15,648/x
  3. Step 3: Cross multiply
    28,223.52x = 38,948 × 15,648
  4. Step 4: Simplify right side
    28,223.52x = 609,458,304
  5. Step 5: Solve for x
    x = 609,458,304/28,223.52
  6. Step 6: Final answer
    x = 21,593.99

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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.