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Finding the Fourth Proportional to 19,919.10, 29,878.65 and 11,039.88

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Solution

The fourth proportional to 19,919.10, 29,878.65 and 11,039.88 is: 16,559.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,919.10 : 29,878.65 = 11,039.88 : x
  2. Step 2: Convert to fraction form
    19,919.10/29,878.65 = 11,039.88/x
  3. Step 3: Cross multiply
    19,919.10x = 29,878.65 × 11,039.88
  4. Step 4: Simplify right side
    19,919.10x = 329,856,710.56
  5. Step 5: Solve for x
    x = 329,856,710.56/19,919.10
  6. Step 6: Final answer
    x = 16,559.82

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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.