Home / 20,480.07-30,720.69-5,690.07

Finding the Fourth Proportional to 20,480.07, 30,720.69 and 5,690.07

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Solution

The fourth proportional to 20,480.07, 30,720.69 and 5,690.07 is: 8,535.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,480.07 : 30,720.69 = 5,690.07 : x
  2. Step 2: Convert to fraction form
    20,480.07/30,720.69 = 5,690.07/x
  3. Step 3: Cross multiply
    20,480.07x = 30,720.69 × 5,690.07
  4. Step 4: Simplify right side
    20,480.07x = 174,802,876.55
  5. Step 5: Solve for x
    x = 174,802,876.55/20,480.07
  6. Step 6: Final answer
    x = 8,535.27

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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.