Home / 20,633.28-30,947.52-6,782.40

Finding the Fourth Proportional to 20,633.28, 30,947.52 and 6,782.40

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Solution

The fourth proportional to 20,633.28, 30,947.52 and 6,782.40 is: 10,172.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,633.28 : 30,947.52 = 6,782.40 : x
  2. Step 2: Convert to fraction form
    20,633.28/30,947.52 = 6,782.40/x
  3. Step 3: Cross multiply
    20,633.28x = 30,947.52 × 6,782.40
  4. Step 4: Simplify right side
    20,633.28x = 209,898,459.65
  5. Step 5: Solve for x
    x = 209,898,459.65/20,633.28
  6. Step 6: Final answer
    x = 10,172.81

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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.