Home / 21,568.25-29,764.64-12,136.81

Finding the Fourth Proportional to 21,568.25, 29,764.64 and 12,136.81

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Solution

The fourth proportional to 21,568.25, 29,764.64 and 12,136.81 is: 16,749.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,568.25 : 29,764.64 = 12,136.81 : x
  2. Step 2: Convert to fraction form
    21,568.25/29,764.64 = 12,136.81/x
  3. Step 3: Cross multiply
    21,568.25x = 29,764.64 × 12,136.81
  4. Step 4: Simplify right side
    21,568.25x = 361,247,780.40
  5. Step 5: Solve for x
    x = 361,247,780.40/21,568.25
  6. Step 6: Final answer
    x = 16,749.05

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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.