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Finding the Fourth Proportional to 18,706.77, 28,024.16 and 11,689.54

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Solution

The fourth proportional to 18,706.77, 28,024.16 and 11,689.54 is: 17,511.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,706.77 : 28,024.16 = 11,689.54 : x
  2. Step 2: Convert to fraction form
    18,706.77/28,024.16 = 11,689.54/x
  3. Step 3: Cross multiply
    18,706.77x = 28,024.16 × 11,689.54
  4. Step 4: Simplify right side
    18,706.77x = 327,589,539.29
  5. Step 5: Solve for x
    x = 327,589,539.29/18,706.77
  6. Step 6: Final answer
    x = 17,511.82

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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.