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Finding the Fourth Proportional to 28,649.77, 42,930.70 and 12,000.70

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Solution

The fourth proportional to 28,649.77, 42,930.70 and 12,000.70 is: 17,982.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,649.77 : 42,930.70 = 12,000.70 : x
  2. Step 2: Convert to fraction form
    28,649.77/42,930.70 = 12,000.70/x
  3. Step 3: Cross multiply
    28,649.77x = 42,930.70 × 12,000.70
  4. Step 4: Simplify right side
    28,649.77x = 515,198,451.49
  5. Step 5: Solve for x
    x = 515,198,451.49/28,649.77
  6. Step 6: Final answer
    x = 17,982.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.