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Finding the Fourth Proportional to 38,940.98, 53,738.51 and 21,035.98

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Solution

The fourth proportional to 38,940.98, 53,738.51 and 21,035.98 is: 29,029.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,940.98 : 53,738.51 = 21,035.98 : x
  2. Step 2: Convert to fraction form
    38,940.98/53,738.51 = 21,035.98/x
  3. Step 3: Cross multiply
    38,940.98x = 53,738.51 × 21,035.98
  4. Step 4: Simplify right side
    38,940.98x = 1,130,441,999.63
  5. Step 5: Solve for x
    x = 1,130,441,999.63/38,940.98
  6. Step 6: Final answer
    x = 29,029.63

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1.5x scale

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.