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Finding the Fourth Proportional to 18,481.70, 25,501.74 and 11,410.40

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Solution

The fourth proportional to 18,481.70, 25,501.74 and 11,410.40 is: 15,744.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,481.70 : 25,501.74 = 11,410.40 : x
  2. Step 2: Convert to fraction form
    18,481.70/25,501.74 = 11,410.40/x
  3. Step 3: Cross multiply
    18,481.70x = 25,501.74 × 11,410.40
  4. Step 4: Simplify right side
    18,481.70x = 290,985,054.10
  5. Step 5: Solve for x
    x = 290,985,054.10/18,481.70
  6. Step 6: Final answer
    x = 15,744.50

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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.