Home / 19,680.12-27,346.59-19,431.72

Finding the Fourth Proportional to 19,680.12, 27,346.59 and 19,431.72

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Solution

The fourth proportional to 19,680.12, 27,346.59 and 19,431.72 is: 27,001.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,680.12 : 27,346.59 = 19,431.72 : x
  2. Step 2: Convert to fraction form
    19,680.12/27,346.59 = 19,431.72/x
  3. Step 3: Cross multiply
    19,680.12x = 27,346.59 × 19,431.72
  4. Step 4: Simplify right side
    19,680.12x = 531,391,279.83
  5. Step 5: Solve for x
    x = 531,391,279.83/19,680.12
  6. Step 6: Final answer
    x = 27,001.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.