Home / 21,131.84-29,161.92-11,700.40

Finding the Fourth Proportional to 21,131.84, 29,161.92 and 11,700.40

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Solution

The fourth proportional to 21,131.84, 29,161.92 and 11,700.40 is: 16,146.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,131.84 : 29,161.92 = 11,700.40 : x
  2. Step 2: Convert to fraction form
    21,131.84/29,161.92 = 11,700.40/x
  3. Step 3: Cross multiply
    21,131.84x = 29,161.92 × 11,700.40
  4. Step 4: Simplify right side
    21,131.84x = 341,206,154.42
  5. Step 5: Solve for x
    x = 341,206,154.42/21,131.84
  6. Step 6: Final answer
    x = 16,146.54

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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.