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Finding the Fourth Proportional to 18,590.53, 25,645.43 and 11,869.09

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Solution

The fourth proportional to 18,590.53, 25,645.43 and 11,869.09 is: 16,373.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,590.53 : 25,645.43 = 11,869.09 : x
  2. Step 2: Convert to fraction form
    18,590.53/25,645.43 = 11,869.09/x
  3. Step 3: Cross multiply
    18,590.53x = 25,645.43 × 11,869.09
  4. Step 4: Simplify right side
    18,590.53x = 304,387,921.53
  5. Step 5: Solve for x
    x = 304,387,921.53/18,590.53
  6. Step 6: Final answer
    x = 16,373.28

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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.