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Finding the Fourth Proportional to 14,761.88, 20,371.40 and 8,137.88

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Solution

The fourth proportional to 14,761.88, 20,371.40 and 8,137.88 is: 11,230.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,761.88 : 20,371.40 = 8,137.88 : x
  2. Step 2: Convert to fraction form
    14,761.88/20,371.40 = 8,137.88/x
  3. Step 3: Cross multiply
    14,761.88x = 20,371.40 × 8,137.88
  4. Step 4: Simplify right side
    14,761.88x = 165,779,866.09
  5. Step 5: Solve for x
    x = 165,779,866.09/14,761.88
  6. Step 6: Final answer
    x = 11,230.27

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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.