Home / 30,782.22-42,468.06-20,177.70

Finding the Fourth Proportional to 30,782.22, 42,468.06 and 20,177.70

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Solution

The fourth proportional to 30,782.22, 42,468.06 and 20,177.70 is: 27,837.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,782.22 : 42,468.06 = 20,177.70 : x
  2. Step 2: Convert to fraction form
    30,782.22/42,468.06 = 20,177.70/x
  3. Step 3: Cross multiply
    30,782.22x = 42,468.06 × 20,177.70
  4. Step 4: Simplify right side
    30,782.22x = 856,907,774.26
  5. Step 5: Solve for x
    x = 856,907,774.26/30,782.22
  6. Step 6: Final answer
    x = 27,837.75

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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.