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Finding the Fourth Proportional to 20,914.99, 28,851.99 and 13,353.37

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Solution

The fourth proportional to 20,914.99, 28,851.99 and 13,353.37 is: 18,420.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,914.99 : 28,851.99 = 13,353.37 : x
  2. Step 2: Convert to fraction form
    20,914.99/28,851.99 = 13,353.37/x
  3. Step 3: Cross multiply
    20,914.99x = 28,851.99 × 13,353.37
  4. Step 4: Simplify right side
    20,914.99x = 385,271,230.94
  5. Step 5: Solve for x
    x = 385,271,230.94/20,914.99
  6. Step 6: Final answer
    x = 18,420.82

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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.