Home / 21,435.28-29,578.41-11,874.89

Finding the Fourth Proportional to 21,435.28, 29,578.41 and 11,874.89

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Solution

The fourth proportional to 21,435.28, 29,578.41 and 11,874.89 is: 16,386.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,435.28 : 29,578.41 = 11,874.89 : x
  2. Step 2: Convert to fraction form
    21,435.28/29,578.41 = 11,874.89/x
  3. Step 3: Cross multiply
    21,435.28x = 29,578.41 × 11,874.89
  4. Step 4: Simplify right side
    21,435.28x = 351,240,439.07
  5. Step 5: Solve for x
    x = 351,240,439.07/21,435.28
  6. Step 6: Final answer
    x = 16,386.09

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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.