Home / 21,439.80-29,586.78-12,007.80

Finding the Fourth Proportional to 21,439.80, 29,586.78 and 12,007.80

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Solution

The fourth proportional to 21,439.80, 29,586.78 and 12,007.80 is: 16,570.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,439.80 : 29,586.78 = 12,007.80 : x
  2. Step 2: Convert to fraction form
    21,439.80/29,586.78 = 12,007.80/x
  3. Step 3: Cross multiply
    21,439.80x = 29,586.78 × 12,007.80
  4. Step 4: Simplify right side
    21,439.80x = 355,272,136.88
  5. Step 5: Solve for x
    x = 355,272,136.88/21,439.80
  6. Step 6: Final answer
    x = 16,570.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.