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Finding the Fourth Proportional to 38,572.38, 53,228.43 and 21,805.74

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Solution

The fourth proportional to 38,572.38, 53,228.43 and 21,805.74 is: 30,091.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,572.38 : 53,228.43 = 21,805.74 : x
  2. Step 2: Convert to fraction form
    38,572.38/53,228.43 = 21,805.74/x
  3. Step 3: Cross multiply
    38,572.38x = 53,228.43 × 21,805.74
  4. Step 4: Simplify right side
    38,572.38x = 1,160,685,305.19
  5. Step 5: Solve for x
    x = 1,160,685,305.19/38,572.38
  6. Step 6: Final answer
    x = 30,091.10

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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.