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Finding the Fourth Proportional to 29,485.80, 40,647.42 and 22,399.92

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Solution

The fourth proportional to 29,485.80, 40,647.42 and 22,399.92 is: 30,879.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,485.80 : 40,647.42 = 22,399.92 : x
  2. Step 2: Convert to fraction form
    29,485.80/40,647.42 = 22,399.92/x
  3. Step 3: Cross multiply
    29,485.80x = 40,647.42 × 22,399.92
  4. Step 4: Simplify right side
    29,485.80x = 910,498,956.21
  5. Step 5: Solve for x
    x = 910,498,956.21/29,485.80
  6. Step 6: Final answer
    x = 30,879.24

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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.