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Finding the Fourth Proportional to 38,964, 53,770.32 and 21,300

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Solution

The fourth proportional to 38,964, 53,770.32 and 21,300 is: 29,394

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,964 : 53,770.32 = 21,300 : x
  2. Step 2: Convert to fraction form
    38,964/53,770.32 = 21,300/x
  3. Step 3: Cross multiply
    38,964x = 53,770.32 × 21,300
  4. Step 4: Simplify right side
    38,964x = 1,145,307,816
  5. Step 5: Solve for x
    x = 1,145,307,816/38,964
  6. Step 6: Final answer
    x = 29,394

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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.