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Finding the Fourth Proportional to 14,640.60, 21,960.90 and 12,672.30

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Solution

The fourth proportional to 14,640.60, 21,960.90 and 12,672.30 is: 19,008.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,640.60 : 21,960.90 = 12,672.30 : x
  2. Step 2: Convert to fraction form
    14,640.60/21,960.90 = 12,672.30/x
  3. Step 3: Cross multiply
    14,640.60x = 21,960.90 × 12,672.30
  4. Step 4: Simplify right side
    14,640.60x = 278,295,113.07
  5. Step 5: Solve for x
    x = 278,295,113.07/14,640.60
  6. Step 6: Final answer
    x = 19,008.45

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1.5x scale

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.