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Finding the Fourth Proportional to 30,115.84, 45,151.84 and 12,590.64

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Solution

The fourth proportional to 30,115.84, 45,151.84 and 12,590.64 is: 18,876.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,115.84 : 45,151.84 = 12,590.64 : x
  2. Step 2: Convert to fraction form
    30,115.84/45,151.84 = 12,590.64/x
  3. Step 3: Cross multiply
    30,115.84x = 45,151.84 × 12,590.64
  4. Step 4: Simplify right side
    30,115.84x = 568,490,562.78
  5. Step 5: Solve for x
    x = 568,490,562.78/30,115.84
  6. Step 6: Final answer
    x = 18,876.80

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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.