Home / 20,128.69-27,747.12-14,150.89

Finding the Fourth Proportional to 20,128.69, 27,747.12 and 14,150.89

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Solution

The fourth proportional to 20,128.69, 27,747.12 and 14,150.89 is: 19,506.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.69 : 27,747.12 = 14,150.89 : x
  2. Step 2: Convert to fraction form
    20,128.69/27,747.12 = 14,150.89/x
  3. Step 3: Cross multiply
    20,128.69x = 27,747.12 × 14,150.89
  4. Step 4: Simplify right side
    20,128.69x = 392,646,442.94
  5. Step 5: Solve for x
    x = 392,646,442.94/20,128.69
  6. Step 6: Final answer
    x = 19,506.81

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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.