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Finding the Fourth Proportional to 30,613.03, 45,922.08 and 8,428.21

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Solution

The fourth proportional to 30,613.03, 45,922.08 and 8,428.21 is: 12,643.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,613.03 : 45,922.08 = 8,428.21 : x
  2. Step 2: Convert to fraction form
    30,613.03/45,922.08 = 8,428.21/x
  3. Step 3: Cross multiply
    30,613.03x = 45,922.08 × 8,428.21
  4. Step 4: Simplify right side
    30,613.03x = 387,040,933.88
  5. Step 5: Solve for x
    x = 387,040,933.88/30,613.03
  6. Step 6: Final answer
    x = 12,643.01

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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.