Home / 20,128.88-27,784.68-11,752.40

Finding the Fourth Proportional to 20,128.88, 27,784.68 and 11,752.40

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Solution

The fourth proportional to 20,128.88, 27,784.68 and 11,752.40 is: 16,222.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.88 : 27,784.68 = 11,752.40 : x
  2. Step 2: Convert to fraction form
    20,128.88/27,784.68 = 11,752.40/x
  3. Step 3: Cross multiply
    20,128.88x = 27,784.68 × 11,752.40
  4. Step 4: Simplify right side
    20,128.88x = 326,536,673.23
  5. Step 5: Solve for x
    x = 326,536,673.23/20,128.88
  6. Step 6: Final answer
    x = 16,222.30

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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.