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Finding the Fourth Proportional to 20,133.80, 30,200.70 and 19,788.20

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Solution

The fourth proportional to 20,133.80, 30,200.70 and 19,788.20 is: 29,682.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,133.80 : 30,200.70 = 19,788.20 : x
  2. Step 2: Convert to fraction form
    20,133.80/30,200.70 = 19,788.20/x
  3. Step 3: Cross multiply
    20,133.80x = 30,200.70 × 19,788.20
  4. Step 4: Simplify right side
    20,133.80x = 597,617,491.74
  5. Step 5: Solve for x
    x = 597,617,491.74/20,133.80
  6. Step 6: Final answer
    x = 29,682.30

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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.