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Finding the Fourth Proportional to 30,329.78, 45,480.90 and 12,790.04

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Solution

The fourth proportional to 30,329.78, 45,480.90 and 12,790.04 is: 19,179.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,329.78 : 45,480.90 = 12,790.04 : x
  2. Step 2: Convert to fraction form
    30,329.78/45,480.90 = 12,790.04/x
  3. Step 3: Cross multiply
    30,329.78x = 45,480.90 × 12,790.04
  4. Step 4: Simplify right side
    30,329.78x = 581,702,530.24
  5. Step 5: Solve for x
    x = 581,702,530.24/30,329.78
  6. Step 6: Final answer
    x = 19,179.25

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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.