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Finding the Fourth Proportional to 14,990.76, 20,689.74 and 14,326.44

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Solution

The fourth proportional to 14,990.76, 20,689.74 and 14,326.44 is: 19,772.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,990.76 : 20,689.74 = 14,326.44 : x
  2. Step 2: Convert to fraction form
    14,990.76/20,689.74 = 14,326.44/x
  3. Step 3: Cross multiply
    14,990.76x = 20,689.74 × 14,326.44
  4. Step 4: Simplify right side
    14,990.76x = 296,410,318.73
  5. Step 5: Solve for x
    x = 296,410,318.73/14,990.76
  6. Step 6: Final answer
    x = 19,772.87

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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.