Home / 30,879.02-42,579.24-20,104.03

Finding the Fourth Proportional to 30,879.02, 42,579.24 and 20,104.03

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Solution

The fourth proportional to 30,879.02, 42,579.24 and 20,104.03 is: 27,721.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,879.02 : 42,579.24 = 20,104.03 : x
  2. Step 2: Convert to fraction form
    30,879.02/42,579.24 = 20,104.03/x
  3. Step 3: Cross multiply
    30,879.02x = 42,579.24 × 20,104.03
  4. Step 4: Simplify right side
    30,879.02x = 856,014,296.17
  5. Step 5: Solve for x
    x = 856,014,296.17/30,879.02
  6. Step 6: Final answer
    x = 27,721.55

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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.