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Finding the Fourth Proportional to 18,686.66, 28,035.03 and 6,208.70

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Solution

The fourth proportional to 18,686.66, 28,035.03 and 6,208.70 is: 9,314.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,686.66 : 28,035.03 = 6,208.70 : x
  2. Step 2: Convert to fraction form
    18,686.66/28,035.03 = 6,208.70/x
  3. Step 3: Cross multiply
    18,686.66x = 28,035.03 × 6,208.70
  4. Step 4: Simplify right side
    18,686.66x = 174,061,090.76
  5. Step 5: Solve for x
    x = 174,061,090.76/18,686.66
  6. Step 6: Final answer
    x = 9,314.72

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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.