Home / 30,840.06-42,567.26-20,111.68

Finding the Fourth Proportional to 30,840.06, 42,567.26 and 20,111.68

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Solution

The fourth proportional to 30,840.06, 42,567.26 and 20,111.68 is: 27,759.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,840.06 : 42,567.26 = 20,111.68 : x
  2. Step 2: Convert to fraction form
    30,840.06/42,567.26 = 20,111.68/x
  3. Step 3: Cross multiply
    30,840.06x = 42,567.26 × 20,111.68
  4. Step 4: Simplify right side
    30,840.06x = 856,099,111.60
  5. Step 5: Solve for x
    x = 856,099,111.60/30,840.06
  6. Step 6: Final answer
    x = 27,759.32

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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.