Home / 21,558.69-32,318.87-8,420.27

Finding the Fourth Proportional to 21,558.69, 32,318.87 and 8,420.27

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Solution

The fourth proportional to 21,558.69, 32,318.87 and 8,420.27 is: 12,622.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,558.69 : 32,318.87 = 8,420.27 : x
  2. Step 2: Convert to fraction form
    21,558.69/32,318.87 = 8,420.27/x
  3. Step 3: Cross multiply
    21,558.69x = 32,318.87 × 8,420.27
  4. Step 4: Simplify right side
    21,558.69x = 272,133,407.80
  5. Step 5: Solve for x
    x = 272,133,407.80/21,558.69
  6. Step 6: Final answer
    x = 12,622.91

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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.