Home / 20,378.18-30,559.82-7,047.81

Finding the Fourth Proportional to 20,378.18, 30,559.82 and 7,047.81

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Solution

The fourth proportional to 20,378.18, 30,559.82 and 7,047.81 is: 10,569.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,378.18 : 30,559.82 = 7,047.81 : x
  2. Step 2: Convert to fraction form
    20,378.18/30,559.82 = 7,047.81/x
  3. Step 3: Cross multiply
    20,378.18x = 30,559.82 × 7,047.81
  4. Step 4: Simplify right side
    20,378.18x = 215,379,769.76
  5. Step 5: Solve for x
    x = 215,379,769.76/20,378.18
  6. Step 6: Final answer
    x = 10,569.14

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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.