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Finding the Fourth Proportional to 39,484.42, 54,488.50 and 21,579.42

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Solution

The fourth proportional to 39,484.42, 54,488.50 and 21,579.42 is: 29,779.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,484.42 : 54,488.50 = 21,579.42 : x
  2. Step 2: Convert to fraction form
    39,484.42/54,488.50 = 21,579.42/x
  3. Step 3: Cross multiply
    39,484.42x = 54,488.50 × 21,579.42
  4. Step 4: Simplify right side
    39,484.42x = 1,175,830,234.12
  5. Step 5: Solve for x
    x = 1,175,830,234.12/39,484.42
  6. Step 6: Final answer
    x = 29,779.60

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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.