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Finding the Fourth Proportional to 38,978.48, 53,790.06 and 21,073.52

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Solution

The fourth proportional to 38,978.48, 53,790.06 and 21,073.52 is: 29,081.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,978.48 : 53,790.06 = 21,073.52 : x
  2. Step 2: Convert to fraction form
    38,978.48/53,790.06 = 21,073.52/x
  3. Step 3: Cross multiply
    38,978.48x = 53,790.06 × 21,073.52
  4. Step 4: Simplify right side
    38,978.48x = 1,133,545,905.21
  5. Step 5: Solve for x
    x = 1,133,545,905.21/38,978.48
  6. Step 6: Final answer
    x = 29,081.33

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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.