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Finding the Fourth Proportional to 30,199.80, 45,299.70 and 21,862.20

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Solution

The fourth proportional to 30,199.80, 45,299.70 and 21,862.20 is: 32,793.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,199.80 : 45,299.70 = 21,862.20 : x
  2. Step 2: Convert to fraction form
    30,199.80/45,299.70 = 21,862.20/x
  3. Step 3: Cross multiply
    30,199.80x = 45,299.70 × 21,862.20
  4. Step 4: Simplify right side
    30,199.80x = 990,351,101.34
  5. Step 5: Solve for x
    x = 990,351,101.34/30,199.80
  6. Step 6: Final answer
    x = 32,793.30

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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.