Home / 20,406.24-30,580.56-8,715.36

Finding the Fourth Proportional to 20,406.24, 30,580.56 and 8,715.36

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Solution

The fourth proportional to 20,406.24, 30,580.56 and 8,715.36 is: 13,060.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,406.24 : 30,580.56 = 8,715.36 : x
  2. Step 2: Convert to fraction form
    20,406.24/30,580.56 = 8,715.36/x
  3. Step 3: Cross multiply
    20,406.24x = 30,580.56 × 8,715.36
  4. Step 4: Simplify right side
    20,406.24x = 266,520,589.40
  5. Step 5: Solve for x
    x = 266,520,589.40/20,406.24
  6. Step 6: Final answer
    x = 13,060.74

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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.