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Finding the Fourth Proportional to 38,957.33, 53,757.87 and 21,728.63

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Solution

The fourth proportional to 38,957.33, 53,757.87 and 21,728.63 is: 29,983.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,957.33 : 53,757.87 = 21,728.63 : x
  2. Step 2: Convert to fraction form
    38,957.33/53,757.87 = 21,728.63/x
  3. Step 3: Cross multiply
    38,957.33x = 53,757.87 × 21,728.63
  4. Step 4: Simplify right side
    38,957.33x = 1,168,084,866.82
  5. Step 5: Solve for x
    x = 1,168,084,866.82/38,957.33
  6. Step 6: Final answer
    x = 29,983.70

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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.