Home / 20,328.28-30,475.99-8,491.13

Finding the Fourth Proportional to 20,328.28, 30,475.99 and 8,491.13

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Solution

The fourth proportional to 20,328.28, 30,475.99 and 8,491.13 is: 12,729.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,328.28 : 30,475.99 = 8,491.13 : x
  2. Step 2: Convert to fraction form
    20,328.28/30,475.99 = 8,491.13/x
  3. Step 3: Cross multiply
    20,328.28x = 30,475.99 × 8,491.13
  4. Step 4: Simplify right side
    20,328.28x = 258,775,479.77
  5. Step 5: Solve for x
    x = 258,775,479.77/20,328.28
  6. Step 6: Final answer
    x = 12,729.82

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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.