Home / 20,885.34-28,817.58-11,935.80

Finding the Fourth Proportional to 20,885.34, 28,817.58 and 11,935.80

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Solution

The fourth proportional to 20,885.34, 28,817.58 and 11,935.80 is: 16,469.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.34 : 28,817.58 = 11,935.80 : x
  2. Step 2: Convert to fraction form
    20,885.34/28,817.58 = 11,935.80/x
  3. Step 3: Cross multiply
    20,885.34x = 28,817.58 × 11,935.80
  4. Step 4: Simplify right side
    20,885.34x = 343,960,871.36
  5. Step 5: Solve for x
    x = 343,960,871.36/20,885.34
  6. Step 6: Final answer
    x = 16,469.01

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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.