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Finding the Fourth Proportional to 53,305.44, 79,948.49 and 13,860.11

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Solution

The fourth proportional to 53,305.44, 79,948.49 and 13,860.11 is: 20,787.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,305.44 : 79,948.49 = 13,860.11 : x
  2. Step 2: Convert to fraction form
    53,305.44/79,948.49 = 13,860.11/x
  3. Step 3: Cross multiply
    53,305.44x = 79,948.49 × 13,860.11
  4. Step 4: Simplify right side
    53,305.44x = 1,108,094,396.69
  5. Step 5: Solve for x
    x = 1,108,094,396.69/53,305.44
  6. Step 6: Final answer
    x = 20,787.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.