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Finding the Fourth Proportional to 12,402.64, 18,605.04 and 4,618

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Solution

The fourth proportional to 12,402.64, 18,605.04 and 4,618 is: 6,927.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,402.64 : 18,605.04 = 4,618 : x
  2. Step 2: Convert to fraction form
    12,402.64/18,605.04 = 4,618/x
  3. Step 3: Cross multiply
    12,402.64x = 18,605.04 × 4,618
  4. Step 4: Simplify right side
    12,402.64x = 85,918,074.72
  5. Step 5: Solve for x
    x = 85,918,074.72/12,402.64
  6. Step 6: Final answer
    x = 6,927.40

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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.