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Finding the Fourth Proportional to 19,003.66, 28,505.55 and 11,207

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Solution

The fourth proportional to 19,003.66, 28,505.55 and 11,207 is: 16,810.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,003.66 : 28,505.55 = 11,207 : x
  2. Step 2: Convert to fraction form
    19,003.66/28,505.55 = 11,207/x
  3. Step 3: Cross multiply
    19,003.66x = 28,505.55 × 11,207
  4. Step 4: Simplify right side
    19,003.66x = 319,461,698.85
  5. Step 5: Solve for x
    x = 319,461,698.85/19,003.66
  6. Step 6: Final answer
    x = 16,810.54

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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.