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Finding the Fourth Proportional to 18,658.15, 25,721.04 and 14,174.11

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Solution

The fourth proportional to 18,658.15, 25,721.04 and 14,174.11 is: 19,539.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,658.15 : 25,721.04 = 14,174.11 : x
  2. Step 2: Convert to fraction form
    18,658.15/25,721.04 = 14,174.11/x
  3. Step 3: Cross multiply
    18,658.15x = 25,721.04 × 14,174.11
  4. Step 4: Simplify right side
    18,658.15x = 364,572,973.30
  5. Step 5: Solve for x
    x = 364,572,973.30/18,658.15
  6. Step 6: Final answer
    x = 19,539.61

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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.