Home / 21,181.56-29,226.49-12,109.78

Finding the Fourth Proportional to 21,181.56, 29,226.49 and 12,109.78

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Solution

The fourth proportional to 21,181.56, 29,226.49 and 12,109.78 is: 16,709.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,181.56 : 29,226.49 = 12,109.78 : x
  2. Step 2: Convert to fraction form
    21,181.56/29,226.49 = 12,109.78/x
  3. Step 3: Cross multiply
    21,181.56x = 29,226.49 × 12,109.78
  4. Step 4: Simplify right side
    21,181.56x = 353,926,364.07
  5. Step 5: Solve for x
    x = 353,926,364.07/21,181.56
  6. Step 6: Final answer
    x = 16,709.17

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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.