Home / 30,090.60-45,233.10-21,385.80

Finding the Fourth Proportional to 30,090.60, 45,233.10 and 21,385.80

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Solution

The fourth proportional to 30,090.60, 45,233.10 and 21,385.80 is: 32,147.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,090.60 : 45,233.10 = 21,385.80 : x
  2. Step 2: Convert to fraction form
    30,090.60/45,233.10 = 21,385.80/x
  3. Step 3: Cross multiply
    30,090.60x = 45,233.10 × 21,385.80
  4. Step 4: Simplify right side
    30,090.60x = 967,346,029.98
  5. Step 5: Solve for x
    x = 967,346,029.98/30,090.60
  6. Step 6: Final answer
    x = 32,147.78

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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.