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Finding the Fourth Proportional to 14,930.31, 20,603.12 and 8,644.71

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Solution

The fourth proportional to 14,930.31, 20,603.12 and 8,644.71 is: 11,929.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,930.31 : 20,603.12 = 8,644.71 : x
  2. Step 2: Convert to fraction form
    14,930.31/20,603.12 = 8,644.71/x
  3. Step 3: Cross multiply
    14,930.31x = 20,603.12 × 8,644.71
  4. Step 4: Simplify right side
    14,930.31x = 178,107,954.27
  5. Step 5: Solve for x
    x = 178,107,954.27/14,930.31
  6. Step 6: Final answer
    x = 11,929.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.