Home / 20,072.81-30,111.08-5,281.81

Finding the Fourth Proportional to 20,072.81, 30,111.08 and 5,281.81

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Solution

The fourth proportional to 20,072.81, 30,111.08 and 5,281.81 is: 7,923.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,072.81 : 30,111.08 = 5,281.81 : x
  2. Step 2: Convert to fraction form
    20,072.81/30,111.08 = 5,281.81/x
  3. Step 3: Cross multiply
    20,072.81x = 30,111.08 × 5,281.81
  4. Step 4: Simplify right side
    20,072.81x = 159,040,901.77
  5. Step 5: Solve for x
    x = 159,040,901.77/20,072.81
  6. Step 6: Final answer
    x = 7,923.20

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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.