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Finding the Fourth Proportional to 18,860.16, 28,278.58 and 6,379

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Solution

The fourth proportional to 18,860.16, 28,278.58 and 6,379 is: 9,564.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,860.16 : 28,278.58 = 6,379 : x
  2. Step 2: Convert to fraction form
    18,860.16/28,278.58 = 6,379/x
  3. Step 3: Cross multiply
    18,860.16x = 28,278.58 × 6,379
  4. Step 4: Simplify right side
    18,860.16x = 180,389,061.82
  5. Step 5: Solve for x
    x = 180,389,061.82/18,860.16
  6. Step 6: Final answer
    x = 9,564.56

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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.