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Finding the Fourth Proportional to 19,155.70, 26,429.70 and 11,199.88

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Solution

The fourth proportional to 19,155.70, 26,429.70 and 11,199.88 is: 15,452.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,155.70 : 26,429.70 = 11,199.88 : x
  2. Step 2: Convert to fraction form
    19,155.70/26,429.70 = 11,199.88/x
  3. Step 3: Cross multiply
    19,155.70x = 26,429.70 × 11,199.88
  4. Step 4: Simplify right side
    19,155.70x = 296,009,468.44
  5. Step 5: Solve for x
    x = 296,009,468.44/19,155.70
  6. Step 6: Final answer
    x = 15,452.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.