Home / 20,873.18-31,322.52-11,509.19

Finding the Fourth Proportional to 20,873.18, 31,322.52 and 11,509.19

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Solution

The fourth proportional to 20,873.18, 31,322.52 and 11,509.19 is: 17,270.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,873.18 : 31,322.52 = 11,509.19 : x
  2. Step 2: Convert to fraction form
    20,873.18/31,322.52 = 11,509.19/x
  3. Step 3: Cross multiply
    20,873.18x = 31,322.52 × 11,509.19
  4. Step 4: Simplify right side
    20,873.18x = 360,496,833.96
  5. Step 5: Solve for x
    x = 360,496,833.96/20,873.18
  6. Step 6: Final answer
    x = 17,270.82

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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.