Home / 30,720.33-42,395.67-18,780.26

Finding the Fourth Proportional to 30,720.33, 42,395.67 and 18,780.26

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Solution

The fourth proportional to 30,720.33, 42,395.67 and 18,780.26 is: 25,917.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,720.33 : 42,395.67 = 18,780.26 : x
  2. Step 2: Convert to fraction form
    30,720.33/42,395.67 = 18,780.26/x
  3. Step 3: Cross multiply
    30,720.33x = 42,395.67 × 18,780.26
  4. Step 4: Simplify right side
    30,720.33x = 796,201,493.50
  5. Step 5: Solve for x
    x = 796,201,493.50/30,720.33
  6. Step 6: Final answer
    x = 25,917.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.