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Finding the Fourth Proportional to 14,640.30, 21,931.08 and 8,793.72

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Solution

The fourth proportional to 14,640.30, 21,931.08 and 8,793.72 is: 13,172.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,640.30 : 21,931.08 = 8,793.72 : x
  2. Step 2: Convert to fraction form
    14,640.30/21,931.08 = 8,793.72/x
  3. Step 3: Cross multiply
    14,640.30x = 21,931.08 × 8,793.72
  4. Step 4: Simplify right side
    14,640.30x = 192,855,776.82
  5. Step 5: Solve for x
    x = 192,855,776.82/14,640.30
  6. Step 6: Final answer
    x = 13,172.94

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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.