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Finding the Fourth Proportional to 20,425.94, 28,188.94 and 12,465.88

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Solution

The fourth proportional to 20,425.94, 28,188.94 and 12,465.88 is: 17,203.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,425.94 : 28,188.94 = 12,465.88 : x
  2. Step 2: Convert to fraction form
    20,425.94/28,188.94 = 12,465.88/x
  3. Step 3: Cross multiply
    20,425.94x = 28,188.94 × 12,465.88
  4. Step 4: Simplify right side
    20,425.94x = 351,399,943.37
  5. Step 5: Solve for x
    x = 351,399,943.37/20,425.94
  6. Step 6: Final answer
    x = 17,203.61

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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.