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Finding the Fourth Proportional to 12,462.12, 18,700.07 and 6,618.51

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Solution

The fourth proportional to 12,462.12, 18,700.07 and 6,618.51 is: 9,931.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,462.12 : 18,700.07 = 6,618.51 : x
  2. Step 2: Convert to fraction form
    12,462.12/18,700.07 = 6,618.51/x
  3. Step 3: Cross multiply
    12,462.12x = 18,700.07 × 6,618.51
  4. Step 4: Simplify right side
    12,462.12x = 123,766,567.20
  5. Step 5: Solve for x
    x = 123,766,567.20/12,462.12
  6. Step 6: Final answer
    x = 9,931.42

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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.