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Finding the Fourth Proportional to 30,021.80, 45,065.10 and 16,899.80

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Solution

The fourth proportional to 30,021.80, 45,065.10 and 16,899.80 is: 25,367.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,021.80 : 45,065.10 = 16,899.80 : x
  2. Step 2: Convert to fraction form
    30,021.80/45,065.10 = 16,899.80/x
  3. Step 3: Cross multiply
    30,021.80x = 45,065.10 × 16,899.80
  4. Step 4: Simplify right side
    30,021.80x = 761,591,176.98
  5. Step 5: Solve for x
    x = 761,591,176.98/30,021.80
  6. Step 6: Final answer
    x = 25,367.94

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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.