Home / 20,102.51-30,120.53-6,947.57

Finding the Fourth Proportional to 20,102.51, 30,120.53 and 6,947.57

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Solution

The fourth proportional to 20,102.51, 30,120.53 and 6,947.57 is: 10,409.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,102.51 : 30,120.53 = 6,947.57 : x
  2. Step 2: Convert to fraction form
    20,102.51/30,120.53 = 6,947.57/x
  3. Step 3: Cross multiply
    20,102.51x = 30,120.53 × 6,947.57
  4. Step 4: Simplify right side
    20,102.51x = 209,264,305.27
  5. Step 5: Solve for x
    x = 209,264,305.27/20,102.51
  6. Step 6: Final answer
    x = 10,409.86

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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.