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Finding the Fourth Proportional to 13,790.68, 20,687.94 and 5,029.72

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Solution

The fourth proportional to 13,790.68, 20,687.94 and 5,029.72 is: 7,545.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,790.68 : 20,687.94 = 5,029.72 : x
  2. Step 2: Convert to fraction form
    13,790.68/20,687.94 = 5,029.72/x
  3. Step 3: Cross multiply
    13,790.68x = 20,687.94 × 5,029.72
  4. Step 4: Simplify right side
    13,790.68x = 104,054,545.58
  5. Step 5: Solve for x
    x = 104,054,545.58/13,790.68
  6. Step 6: Final answer
    x = 7,545.28

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1.5x scale

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.