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Finding the Fourth Proportional to 28,752.50, 42,951.88 and 20,786.96

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Solution

The fourth proportional to 28,752.50, 42,951.88 and 20,786.96 is: 31,052.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,752.50 : 42,951.88 = 20,786.96 : x
  2. Step 2: Convert to fraction form
    28,752.50/42,951.88 = 20,786.96/x
  3. Step 3: Cross multiply
    28,752.50x = 42,951.88 × 20,786.96
  4. Step 4: Simplify right side
    28,752.50x = 892,839,011.48
  5. Step 5: Solve for x
    x = 892,839,011.48/28,752.50
  6. Step 6: Final answer
    x = 31,052.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.