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Finding the Fourth Proportional to 18,699.87, 25,840.04 and 17,788.71

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Solution

The fourth proportional to 18,699.87, 25,840.04 and 17,788.71 is: 24,580.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,699.87 : 25,840.04 = 17,788.71 : x
  2. Step 2: Convert to fraction form
    18,699.87/25,840.04 = 17,788.71/x
  3. Step 3: Cross multiply
    18,699.87x = 25,840.04 × 17,788.71
  4. Step 4: Simplify right side
    18,699.87x = 459,660,889.00
  5. Step 5: Solve for x
    x = 459,660,889.00/18,699.87
  6. Step 6: Final answer
    x = 24,580.97

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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.