Home / 20,158.30-27,817.20-11,205.50

Finding the Fourth Proportional to 20,158.30, 27,817.20 and 11,205.50

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Solution

The fourth proportional to 20,158.30, 27,817.20 and 11,205.50 is: 15,462.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,158.30 : 27,817.20 = 11,205.50 : x
  2. Step 2: Convert to fraction form
    20,158.30/27,817.20 = 11,205.50/x
  3. Step 3: Cross multiply
    20,158.30x = 27,817.20 × 11,205.50
  4. Step 4: Simplify right side
    20,158.30x = 311,705,634.60
  5. Step 5: Solve for x
    x = 311,705,634.60/20,158.30
  6. Step 6: Final answer
    x = 15,462.89

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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.