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Finding the Fourth Proportional to 38,673.84, 53,369.88 and 21,678.24

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Solution

The fourth proportional to 38,673.84, 53,369.88 and 21,678.24 is: 29,915.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,673.84 : 53,369.88 = 21,678.24 : x
  2. Step 2: Convert to fraction form
    38,673.84/53,369.88 = 21,678.24/x
  3. Step 3: Cross multiply
    38,673.84x = 53,369.88 × 21,678.24
  4. Step 4: Simplify right side
    38,673.84x = 1,156,965,067.41
  5. Step 5: Solve for x
    x = 1,156,965,067.41/38,673.84
  6. Step 6: Final answer
    x = 29,915.96

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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.