Home / 20,939.38-31,412.31-13,035.81

Finding the Fourth Proportional to 20,939.38, 31,412.31 and 13,035.81

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Solution

The fourth proportional to 20,939.38, 31,412.31 and 13,035.81 is: 19,555.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.38 : 31,412.31 = 13,035.81 : x
  2. Step 2: Convert to fraction form
    20,939.38/31,412.31 = 13,035.81/x
  3. Step 3: Cross multiply
    20,939.38x = 31,412.31 × 13,035.81
  4. Step 4: Simplify right side
    20,939.38x = 409,484,904.82
  5. Step 5: Solve for x
    x = 409,484,904.82/20,939.38
  6. Step 6: Final answer
    x = 19,555.73

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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.