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Finding the Fourth Proportional to 14,940.80, 20,619.29 and 8,653.18

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Solution

The fourth proportional to 14,940.80, 20,619.29 and 8,653.18 is: 11,941.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,940.80 : 20,619.29 = 8,653.18 : x
  2. Step 2: Convert to fraction form
    14,940.80/20,619.29 = 8,653.18/x
  3. Step 3: Cross multiply
    14,940.80x = 20,619.29 × 8,653.18
  4. Step 4: Simplify right side
    14,940.80x = 178,422,397.93
  5. Step 5: Solve for x
    x = 178,422,397.93/14,940.80
  6. Step 6: Final answer
    x = 11,941.96

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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.