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Finding the Fourth Proportional to 20,642.99, 28,496.03 and 13,937.69

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Solution

The fourth proportional to 20,642.99, 28,496.03 and 13,937.69 is: 19,239.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,642.99 : 28,496.03 = 13,937.69 : x
  2. Step 2: Convert to fraction form
    20,642.99/28,496.03 = 13,937.69/x
  3. Step 3: Cross multiply
    20,642.99x = 28,496.03 × 13,937.69
  4. Step 4: Simplify right side
    20,642.99x = 397,168,832.37
  5. Step 5: Solve for x
    x = 397,168,832.37/20,642.99
  6. Step 6: Final answer
    x = 19,239.89

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.