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Finding the Fourth Proportional to 20,114.80, 27,745.81 and 12,953.99

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Solution

The fourth proportional to 20,114.80, 27,745.81 and 12,953.99 is: 17,868.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,114.80 : 27,745.81 = 12,953.99 : x
  2. Step 2: Convert to fraction form
    20,114.80/27,745.81 = 12,953.99/x
  3. Step 3: Cross multiply
    20,114.80x = 27,745.81 × 12,953.99
  4. Step 4: Simplify right side
    20,114.80x = 359,418,982.26
  5. Step 5: Solve for x
    x = 359,418,982.26/20,114.80
  6. Step 6: Final answer
    x = 17,868.39

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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.