Home / 19,857.59-27,396.62-12,691.70

Finding the Fourth Proportional to 19,857.59, 27,396.62 and 12,691.70

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Solution

The fourth proportional to 19,857.59, 27,396.62 and 12,691.70 is: 17,510.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,857.59 : 27,396.62 = 12,691.70 : x
  2. Step 2: Convert to fraction form
    19,857.59/27,396.62 = 12,691.70/x
  3. Step 3: Cross multiply
    19,857.59x = 27,396.62 × 12,691.70
  4. Step 4: Simplify right side
    19,857.59x = 347,709,517.78
  5. Step 5: Solve for x
    x = 347,709,517.78/19,857.59
  6. Step 6: Final answer
    x = 17,510.16

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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.