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Finding the Fourth Proportional to 19,361.99, 28,996.20 and 11,016.72

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Solution

The fourth proportional to 19,361.99, 28,996.20 and 11,016.72 is: 16,498.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,361.99 : 28,996.20 = 11,016.72 : x
  2. Step 2: Convert to fraction form
    19,361.99/28,996.20 = 11,016.72/x
  3. Step 3: Cross multiply
    19,361.99x = 28,996.20 × 11,016.72
  4. Step 4: Simplify right side
    19,361.99x = 319,443,088.95
  5. Step 5: Solve for x
    x = 319,443,088.95/19,361.99
  6. Step 6: Final answer
    x = 16,498.47

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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.