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Finding the Fourth Proportional to 18,959.45, 28,417.97 and 7,101.81

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Solution

The fourth proportional to 18,959.45, 28,417.97 and 7,101.81 is: 10,644.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,959.45 : 28,417.97 = 7,101.81 : x
  2. Step 2: Convert to fraction form
    18,959.45/28,417.97 = 7,101.81/x
  3. Step 3: Cross multiply
    18,959.45x = 28,417.97 × 7,101.81
  4. Step 4: Simplify right side
    18,959.45x = 201,819,041.28
  5. Step 5: Solve for x
    x = 201,819,041.28/18,959.45
  6. Step 6: Final answer
    x = 10,644.78

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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.