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Finding the Fourth Proportional to 18,959.64, 28,443.50 and 7,272.76

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Solution

The fourth proportional to 18,959.64, 28,443.50 and 7,272.76 is: 10,910.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,959.64 : 28,443.50 = 7,272.76 : x
  2. Step 2: Convert to fraction form
    18,959.64/28,443.50 = 7,272.76/x
  3. Step 3: Cross multiply
    18,959.64x = 28,443.50 × 7,272.76
  4. Step 4: Simplify right side
    18,959.64x = 206,862,749.06
  5. Step 5: Solve for x
    x = 206,862,749.06/18,959.64
  6. Step 6: Final answer
    x = 10,910.69

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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.