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Finding the Fourth Proportional to 31,090.40, 46,635.60 and 19,410.20

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Solution

The fourth proportional to 31,090.40, 46,635.60 and 19,410.20 is: 29,115.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,090.40 : 46,635.60 = 19,410.20 : x
  2. Step 2: Convert to fraction form
    31,090.40/46,635.60 = 19,410.20/x
  3. Step 3: Cross multiply
    31,090.40x = 46,635.60 × 19,410.20
  4. Step 4: Simplify right side
    31,090.40x = 905,206,323.12
  5. Step 5: Solve for x
    x = 905,206,323.12/31,090.40
  6. Step 6: Final answer
    x = 29,115.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.