Home / 21,161.46-29,199.74-11,730

Finding the Fourth Proportional to 21,161.46, 29,199.74 and 11,730

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Solution

The fourth proportional to 21,161.46, 29,199.74 and 11,730 is: 16,185.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,161.46 : 29,199.74 = 11,730 : x
  2. Step 2: Convert to fraction form
    21,161.46/29,199.74 = 11,730/x
  3. Step 3: Cross multiply
    21,161.46x = 29,199.74 × 11,730
  4. Step 4: Simplify right side
    21,161.46x = 342,512,950.20
  5. Step 5: Solve for x
    x = 342,512,950.20/21,161.46
  6. Step 6: Final answer
    x = 16,185.70

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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.