Home / 20,529.65-30,786.28-8,688.87

Finding the Fourth Proportional to 20,529.65, 30,786.28 and 8,688.87

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Solution

The fourth proportional to 20,529.65, 30,786.28 and 8,688.87 is: 13,029.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,529.65 : 30,786.28 = 8,688.87 : x
  2. Step 2: Convert to fraction form
    20,529.65/30,786.28 = 8,688.87/x
  3. Step 3: Cross multiply
    20,529.65x = 30,786.28 × 8,688.87
  4. Step 4: Simplify right side
    20,529.65x = 267,497,962.98
  5. Step 5: Solve for x
    x = 267,497,962.98/20,529.65
  6. Step 6: Final answer
    x = 13,029.83

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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.