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Finding the Fourth Proportional to 30,000.20, 45,025.90 and 13,385.80

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Solution

The fourth proportional to 30,000.20, 45,025.90 and 13,385.80 is: 20,090.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,000.20 : 45,025.90 = 13,385.80 : x
  2. Step 2: Convert to fraction form
    30,000.20/45,025.90 = 13,385.80/x
  3. Step 3: Cross multiply
    30,000.20x = 45,025.90 × 13,385.80
  4. Step 4: Simplify right side
    30,000.20x = 602,707,692.22
  5. Step 5: Solve for x
    x = 602,707,692.22/30,000.20
  6. Step 6: Final answer
    x = 20,090.12

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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.