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Finding the Fourth Proportional to 20,588.20, 30,882.30 and 19,205.80

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Solution

The fourth proportional to 20,588.20, 30,882.30 and 19,205.80 is: 28,808.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,588.20 : 30,882.30 = 19,205.80 : x
  2. Step 2: Convert to fraction form
    20,588.20/30,882.30 = 19,205.80/x
  3. Step 3: Cross multiply
    20,588.20x = 30,882.30 × 19,205.80
  4. Step 4: Simplify right side
    20,588.20x = 593,119,277.34
  5. Step 5: Solve for x
    x = 593,119,277.34/20,588.20
  6. Step 6: Final answer
    x = 28,808.70

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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.