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Finding the Fourth Proportional to 18,693.98, 25,800.49 and 11,987.18

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Solution

The fourth proportional to 18,693.98, 25,800.49 and 11,987.18 is: 16,544.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,693.98 : 25,800.49 = 11,987.18 : x
  2. Step 2: Convert to fraction form
    18,693.98/25,800.49 = 11,987.18/x
  3. Step 3: Cross multiply
    18,693.98x = 25,800.49 × 11,987.18
  4. Step 4: Simplify right side
    18,693.98x = 309,275,117.72
  5. Step 5: Solve for x
    x = 309,275,117.72/18,693.98
  6. Step 6: Final answer
    x = 16,544.10

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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.