Home / 19,679.12-27,160.08-12,963.68

Finding the Fourth Proportional to 19,679.12, 27,160.08 and 12,963.68

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Solution

The fourth proportional to 19,679.12, 27,160.08 and 12,963.68 is: 17,891.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,679.12 : 27,160.08 = 12,963.68 : x
  2. Step 2: Convert to fraction form
    19,679.12/27,160.08 = 12,963.68/x
  3. Step 3: Cross multiply
    19,679.12x = 27,160.08 × 12,963.68
  4. Step 4: Simplify right side
    19,679.12x = 352,094,585.89
  5. Step 5: Solve for x
    x = 352,094,585.89/19,679.12
  6. Step 6: Final answer
    x = 17,891.79

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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.