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Finding the Fourth Proportional to 19,658.96, 27,129.89 and 11,160.89

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Solution

The fourth proportional to 19,658.96, 27,129.89 and 11,160.89 is: 15,402.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,658.96 : 27,129.89 = 11,160.89 : x
  2. Step 2: Convert to fraction form
    19,658.96/27,129.89 = 11,160.89/x
  3. Step 3: Cross multiply
    19,658.96x = 27,129.89 × 11,160.89
  4. Step 4: Simplify right side
    19,658.96x = 302,793,610.25
  5. Step 5: Solve for x
    x = 302,793,610.25/19,658.96
  6. Step 6: Final answer
    x = 15,402.32

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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.