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Finding the Fourth Proportional to 28,601.70, 42,908.21 and 8,879.41

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Solution

The fourth proportional to 28,601.70, 42,908.21 and 8,879.41 is: 13,320.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,601.70 : 42,908.21 = 8,879.41 : x
  2. Step 2: Convert to fraction form
    28,601.70/42,908.21 = 8,879.41/x
  3. Step 3: Cross multiply
    28,601.70x = 42,908.21 × 8,879.41
  4. Step 4: Simplify right side
    28,601.70x = 380,999,588.96
  5. Step 5: Solve for x
    x = 380,999,588.96/28,601.70
  6. Step 6: Final answer
    x = 13,320.87

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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.