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Finding the Fourth Proportional to 19,593.72, 27,020.62 and 12,885

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Solution

The fourth proportional to 19,593.72, 27,020.62 and 12,885 is: 17,768.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,593.72 : 27,020.62 = 12,885 : x
  2. Step 2: Convert to fraction form
    19,593.72/27,020.62 = 12,885/x
  3. Step 3: Cross multiply
    19,593.72x = 27,020.62 × 12,885
  4. Step 4: Simplify right side
    19,593.72x = 348,160,688.70
  5. Step 5: Solve for x
    x = 348,160,688.70/19,593.72
  6. Step 6: Final answer
    x = 17,768.99

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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.