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Finding the Fourth Proportional to 38,988, 53,803.44 and 21,324

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Solution

The fourth proportional to 38,988, 53,803.44 and 21,324 is: 29,427.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,988 : 53,803.44 = 21,324 : x
  2. Step 2: Convert to fraction form
    38,988/53,803.44 = 21,324/x
  3. Step 3: Cross multiply
    38,988x = 53,803.44 × 21,324
  4. Step 4: Simplify right side
    38,988x = 1,147,304,554.56
  5. Step 5: Solve for x
    x = 1,147,304,554.56/38,988
  6. Step 6: Final answer
    x = 29,427.12

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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.