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Finding the Fourth Proportional to 38,031, 52,485.21 and 21,264

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Solution

The fourth proportional to 38,031, 52,485.21 and 21,264 is: 29,345.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,031 : 52,485.21 = 21,264 : x
  2. Step 2: Convert to fraction form
    38,031/52,485.21 = 21,264/x
  3. Step 3: Cross multiply
    38,031x = 52,485.21 × 21,264
  4. Step 4: Simplify right side
    38,031x = 1,116,045,505.44
  5. Step 5: Solve for x
    x = 1,116,045,505.44/38,031
  6. Step 6: Final answer
    x = 29,345.68

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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.