Home / 20,917.32-31,347.48-11,543.38

Finding the Fourth Proportional to 20,917.32, 31,347.48 and 11,543.38

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Solution

The fourth proportional to 20,917.32, 31,347.48 and 11,543.38 is: 17,299.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,917.32 : 31,347.48 = 11,543.38 : x
  2. Step 2: Convert to fraction form
    20,917.32/31,347.48 = 11,543.38/x
  3. Step 3: Cross multiply
    20,917.32x = 31,347.48 × 11,543.38
  4. Step 4: Simplify right side
    20,917.32x = 361,855,873.68
  5. Step 5: Solve for x
    x = 361,855,873.68/20,917.32
  6. Step 6: Final answer
    x = 17,299.34

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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.