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Finding the Fourth Proportional to 14,932.20, 20,602.62 and 8,640.84

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Solution

The fourth proportional to 14,932.20, 20,602.62 and 8,640.84 is: 11,922.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,932.20 : 20,602.62 = 8,640.84 : x
  2. Step 2: Convert to fraction form
    14,932.20/20,602.62 = 8,640.84/x
  3. Step 3: Cross multiply
    14,932.20x = 20,602.62 × 8,640.84
  4. Step 4: Simplify right side
    14,932.20x = 178,023,943.00
  5. Step 5: Solve for x
    x = 178,023,943.00/14,932.20
  6. Step 6: Final answer
    x = 11,922.15

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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.