Home / 12,490.21-18,741.80-9,055.81

Finding the Fourth Proportional to 12,490.21, 18,741.80 and 9,055.81

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Solution

The fourth proportional to 12,490.21, 18,741.80 and 9,055.81 is: 13,588.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,490.21 : 18,741.80 = 9,055.81 : x
  2. Step 2: Convert to fraction form
    12,490.21/18,741.80 = 9,055.81/x
  3. Step 3: Cross multiply
    12,490.21x = 18,741.80 × 9,055.81
  4. Step 4: Simplify right side
    12,490.21x = 169,722,179.86
  5. Step 5: Solve for x
    x = 169,722,179.86/12,490.21
  6. Step 6: Final answer
    x = 13,588.42

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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.