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Finding the Fourth Proportional to 18,693.73, 25,800.14 and 11,986.93

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Solution

The fourth proportional to 18,693.73, 25,800.14 and 11,986.93 is: 16,543.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,693.73 : 25,800.14 = 11,986.93 : x
  2. Step 2: Convert to fraction form
    18,693.73/25,800.14 = 11,986.93/x
  3. Step 3: Cross multiply
    18,693.73x = 25,800.14 × 11,986.93
  4. Step 4: Simplify right side
    18,693.73x = 309,264,437.64
  5. Step 5: Solve for x
    x = 309,264,437.64/18,693.73
  6. Step 6: Final answer
    x = 16,543.75

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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.