Home / 21,651.42-29,876.81-12,218.16

Finding the Fourth Proportional to 21,651.42, 29,876.81 and 12,218.16

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Solution

The fourth proportional to 21,651.42, 29,876.81 and 12,218.16 is: 16,859.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,651.42 : 29,876.81 = 12,218.16 : x
  2. Step 2: Convert to fraction form
    21,651.42/29,876.81 = 12,218.16/x
  3. Step 3: Cross multiply
    21,651.42x = 29,876.81 × 12,218.16
  4. Step 4: Simplify right side
    21,651.42x = 365,039,583.78
  5. Step 5: Solve for x
    x = 365,039,583.78/21,651.42
  6. Step 6: Final answer
    x = 16,859.84

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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.