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Finding the Fourth Proportional to 12,430.12, 18,648.42 and 4,639

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Solution

The fourth proportional to 12,430.12, 18,648.42 and 4,639 is: 6,959.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,430.12 : 18,648.42 = 4,639 : x
  2. Step 2: Convert to fraction form
    12,430.12/18,648.42 = 4,639/x
  3. Step 3: Cross multiply
    12,430.12x = 18,648.42 × 4,639
  4. Step 4: Simplify right side
    12,430.12x = 86,510,020.38
  5. Step 5: Solve for x
    x = 86,510,020.38/12,430.12
  6. Step 6: Final answer
    x = 6,959.71

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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.