Home / 20,773.09-31,133.71-10,387.81

Finding the Fourth Proportional to 20,773.09, 31,133.71 and 10,387.81

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Solution

The fourth proportional to 20,773.09, 31,133.71 and 10,387.81 is: 15,568.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,773.09 : 31,133.71 = 10,387.81 : x
  2. Step 2: Convert to fraction form
    20,773.09/31,133.71 = 10,387.81/x
  3. Step 3: Cross multiply
    20,773.09x = 31,133.71 × 10,387.81
  4. Step 4: Simplify right side
    20,773.09x = 323,411,064.08
  5. Step 5: Solve for x
    x = 323,411,064.08/20,773.09
  6. Step 6: Final answer
    x = 15,568.75

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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.