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Finding the Fourth Proportional to 30,229.80, 45,344.70 and 21,870.60

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Solution

The fourth proportional to 30,229.80, 45,344.70 and 21,870.60 is: 32,805.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,229.80 : 45,344.70 = 21,870.60 : x
  2. Step 2: Convert to fraction form
    30,229.80/45,344.70 = 21,870.60/x
  3. Step 3: Cross multiply
    30,229.80x = 45,344.70 × 21,870.60
  4. Step 4: Simplify right side
    30,229.80x = 991,715,795.82
  5. Step 5: Solve for x
    x = 991,715,795.82/30,229.80
  6. Step 6: Final answer
    x = 32,805.90

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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.