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Finding the Fourth Proportional to 18,951.26, 28,407.03 and 10,619.06

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Solution

The fourth proportional to 18,951.26, 28,407.03 and 10,619.06 is: 15,917.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,951.26 : 28,407.03 = 10,619.06 : x
  2. Step 2: Convert to fraction form
    18,951.26/28,407.03 = 10,619.06/x
  3. Step 3: Cross multiply
    18,951.26x = 28,407.03 × 10,619.06
  4. Step 4: Simplify right side
    18,951.26x = 301,655,955.99
  5. Step 5: Solve for x
    x = 301,655,955.99/18,951.26
  6. Step 6: Final answer
    x = 15,917.46

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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.