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Finding the Fourth Proportional to 30,648.99, 45,885.77 and 20,770.71

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Solution

The fourth proportional to 30,648.99, 45,885.77 and 20,770.71 is: 31,096.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,648.99 : 45,885.77 = 20,770.71 : x
  2. Step 2: Convert to fraction form
    30,648.99/45,885.77 = 20,770.71/x
  3. Step 3: Cross multiply
    30,648.99x = 45,885.77 × 20,770.71
  4. Step 4: Simplify right side
    30,648.99x = 953,080,021.80
  5. Step 5: Solve for x
    x = 953,080,021.80/30,648.99
  6. Step 6: Final answer
    x = 31,096.62

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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.