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Finding the Fourth Proportional to 12,489.96, 18,741.42 and 9,055.56

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Solution

The fourth proportional to 12,489.96, 18,741.42 and 9,055.56 is: 13,588.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,489.96 : 18,741.42 = 9,055.56 : x
  2. Step 2: Convert to fraction form
    12,489.96/18,741.42 = 9,055.56/x
  3. Step 3: Cross multiply
    12,489.96x = 18,741.42 × 9,055.56
  4. Step 4: Simplify right side
    12,489.96x = 169,714,053.30
  5. Step 5: Solve for x
    x = 169,714,053.30/12,489.96
  6. Step 6: Final answer
    x = 13,588.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.