Home / 28,136.70-42,204.24-8,415.90

Finding the Fourth Proportional to 28,136.70, 42,204.24 and 8,415.90

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Solution

The fourth proportional to 28,136.70, 42,204.24 and 8,415.90 is: 12,623.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,136.70 : 42,204.24 = 8,415.90 : x
  2. Step 2: Convert to fraction form
    28,136.70/42,204.24 = 8,415.90/x
  3. Step 3: Cross multiply
    28,136.70x = 42,204.24 × 8,415.90
  4. Step 4: Simplify right side
    28,136.70x = 355,186,663.42
  5. Step 5: Solve for x
    x = 355,186,663.42/28,136.70
  6. Step 6: Final answer
    x = 12,623.61

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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.