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Finding the Fourth Proportional to 31,230.52, 43,098.10 and 21,804.52

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Solution

The fourth proportional to 31,230.52, 43,098.10 and 21,804.52 is: 30,090.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,230.52 : 43,098.10 = 21,804.52 : x
  2. Step 2: Convert to fraction form
    31,230.52/43,098.10 = 21,804.52/x
  3. Step 3: Cross multiply
    31,230.52x = 43,098.10 × 21,804.52
  4. Step 4: Simplify right side
    31,230.52x = 939,733,383.41
  5. Step 5: Solve for x
    x = 939,733,383.41/31,230.52
  6. Step 6: Final answer
    x = 30,090.23

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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.