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Finding the Fourth Proportional to 18,693.51, 27,955 and 13,953.03

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Solution

The fourth proportional to 18,693.51, 27,955 and 13,953.03 is: 20,865.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,693.51 : 27,955 = 13,953.03 : x
  2. Step 2: Convert to fraction form
    18,693.51/27,955 = 13,953.03/x
  3. Step 3: Cross multiply
    18,693.51x = 27,955 × 13,953.03
  4. Step 4: Simplify right side
    18,693.51x = 390,056,953.65
  5. Step 5: Solve for x
    x = 390,056,953.65/18,693.51
  6. Step 6: Final answer
    x = 20,865.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.