Home / 15,775.35-21,767.09-12,786.04

Finding the Fourth Proportional to 15,775.35, 21,767.09 and 12,786.04

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Solution

The fourth proportional to 15,775.35, 21,767.09 and 12,786.04 is: 17,642.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,775.35 : 21,767.09 = 12,786.04 : x
  2. Step 2: Convert to fraction form
    15,775.35/21,767.09 = 12,786.04/x
  3. Step 3: Cross multiply
    15,775.35x = 21,767.09 × 12,786.04
  4. Step 4: Simplify right side
    15,775.35x = 278,314,883.42
  5. Step 5: Solve for x
    x = 278,314,883.42/15,775.35
  6. Step 6: Final answer
    x = 17,642.39

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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.