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Finding the Fourth Proportional to 18,129.24, 25,019.15 and 11,412.32

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Solution

The fourth proportional to 18,129.24, 25,019.15 and 11,412.32 is: 15,749.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,129.24 : 25,019.15 = 11,412.32 : x
  2. Step 2: Convert to fraction form
    18,129.24/25,019.15 = 11,412.32/x
  3. Step 3: Cross multiply
    18,129.24x = 25,019.15 × 11,412.32
  4. Step 4: Simplify right side
    18,129.24x = 285,526,363.77
  5. Step 5: Solve for x
    x = 285,526,363.77/18,129.24
  6. Step 6: Final answer
    x = 15,749.49

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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.