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Finding the Fourth Proportional to 38,143, 52,640.58 and 21,379.24

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Solution

The fourth proportional to 38,143, 52,640.58 and 21,379.24 is: 29,505.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,143 : 52,640.58 = 21,379.24 : x
  2. Step 2: Convert to fraction form
    38,143/52,640.58 = 21,379.24/x
  3. Step 3: Cross multiply
    38,143x = 52,640.58 × 21,379.24
  4. Step 4: Simplify right side
    38,143x = 1,125,415,593.56
  5. Step 5: Solve for x
    x = 1,125,415,593.56/38,143
  6. Step 6: Final answer
    x = 29,505.17

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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.