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Finding the Fourth Proportional to 30,874.80, 46,355.40 and 19,210.80

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Solution

The fourth proportional to 30,874.80, 46,355.40 and 19,210.80 is: 28,843.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,874.80 : 46,355.40 = 19,210.80 : x
  2. Step 2: Convert to fraction form
    30,874.80/46,355.40 = 19,210.80/x
  3. Step 3: Cross multiply
    30,874.80x = 46,355.40 × 19,210.80
  4. Step 4: Simplify right side
    30,874.80x = 890,524,318.32
  5. Step 5: Solve for x
    x = 890,524,318.32/30,874.80
  6. Step 6: Final answer
    x = 28,843.08

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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.