Home / 20,225.07-27,899.58-12,669.78

Finding the Fourth Proportional to 20,225.07, 27,899.58 and 12,669.78

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Solution

The fourth proportional to 20,225.07, 27,899.58 and 12,669.78 is: 17,477.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,225.07 : 27,899.58 = 12,669.78 : x
  2. Step 2: Convert to fraction form
    20,225.07/27,899.58 = 12,669.78/x
  3. Step 3: Cross multiply
    20,225.07x = 27,899.58 × 12,669.78
  4. Step 4: Simplify right side
    20,225.07x = 353,481,540.69
  5. Step 5: Solve for x
    x = 353,481,540.69/20,225.07
  6. Step 6: Final answer
    x = 17,477.40

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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.