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Finding the Fourth Proportional to 42,393.84, 63,625.32 and 21,623.28

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Solution

The fourth proportional to 42,393.84, 63,625.32 and 21,623.28 is: 32,452.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,393.84 : 63,625.32 = 21,623.28 : x
  2. Step 2: Convert to fraction form
    42,393.84/63,625.32 = 21,623.28/x
  3. Step 3: Cross multiply
    42,393.84x = 63,625.32 × 21,623.28
  4. Step 4: Simplify right side
    42,393.84x = 1,375,788,109.45
  5. Step 5: Solve for x
    x = 1,375,788,109.45/42,393.84
  6. Step 6: Final answer
    x = 32,452.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.