Home / 21,977.76-32,979.60-8,136.48

Finding the Fourth Proportional to 21,977.76, 32,979.60 and 8,136.48

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Solution

The fourth proportional to 21,977.76, 32,979.60 and 8,136.48 is: 12,209.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,977.76 : 32,979.60 = 8,136.48 : x
  2. Step 2: Convert to fraction form
    21,977.76/32,979.60 = 8,136.48/x
  3. Step 3: Cross multiply
    21,977.76x = 32,979.60 × 8,136.48
  4. Step 4: Simplify right side
    21,977.76x = 268,337,855.81
  5. Step 5: Solve for x
    x = 268,337,855.81/21,977.76
  6. Step 6: Final answer
    x = 12,209.52

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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.