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Finding the Fourth Proportional to 18,706.66, 28,059.86 and 4,666.62

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Solution

The fourth proportional to 18,706.66, 28,059.86 and 4,666.62 is: 6,999.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,706.66 : 28,059.86 = 4,666.62 : x
  2. Step 2: Convert to fraction form
    18,706.66/28,059.86 = 4,666.62/x
  3. Step 3: Cross multiply
    18,706.66x = 28,059.86 × 4,666.62
  4. Step 4: Simplify right side
    18,706.66x = 130,944,703.87
  5. Step 5: Solve for x
    x = 130,944,703.87/18,706.66
  6. Step 6: Final answer
    x = 6,999.90

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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.