Home / 21,156.79-29,198.42-11,727.67

Finding the Fourth Proportional to 21,156.79, 29,198.42 and 11,727.67

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Solution

The fourth proportional to 21,156.79, 29,198.42 and 11,727.67 is: 16,185.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,156.79 : 29,198.42 = 11,727.67 : x
  2. Step 2: Convert to fraction form
    21,156.79/29,198.42 = 11,727.67/x
  3. Step 3: Cross multiply
    21,156.79x = 29,198.42 × 11,727.67
  4. Step 4: Simplify right side
    21,156.79x = 342,429,434.28
  5. Step 5: Solve for x
    x = 342,429,434.28/21,156.79
  6. Step 6: Final answer
    x = 16,185.32

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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.