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Finding the Fourth Proportional to 53,113.88, 79,674.90 and 13,671.38

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Solution

The fourth proportional to 53,113.88, 79,674.90 and 13,671.38 is: 20,508.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,113.88 : 79,674.90 = 13,671.38 : x
  2. Step 2: Convert to fraction form
    53,113.88/79,674.90 = 13,671.38/x
  3. Step 3: Cross multiply
    53,113.88x = 79,674.90 × 13,671.38
  4. Step 4: Simplify right side
    53,113.88x = 1,089,265,834.36
  5. Step 5: Solve for x
    x = 1,089,265,834.36/53,113.88
  6. Step 6: Final answer
    x = 20,508.12

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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.