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Finding the Fourth Proportional to 20,292.17, 27,992.99 and 13,578.08

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Solution

The fourth proportional to 20,292.17, 27,992.99 and 13,578.08 is: 18,730.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,292.17 : 27,992.99 = 13,578.08 : x
  2. Step 2: Convert to fraction form
    20,292.17/27,992.99 = 13,578.08/x
  3. Step 3: Cross multiply
    20,292.17x = 27,992.99 × 13,578.08
  4. Step 4: Simplify right side
    20,292.17x = 380,090,849.80
  5. Step 5: Solve for x
    x = 380,090,849.80/20,292.17
  6. Step 6: Final answer
    x = 18,730.92

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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.