Home / 21,165.30-29,201.31-12,207.51

Finding the Fourth Proportional to 21,165.30, 29,201.31 and 12,207.51

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Solution

The fourth proportional to 21,165.30, 29,201.31 and 12,207.51 is: 16,842.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,165.30 : 29,201.31 = 12,207.51 : x
  2. Step 2: Convert to fraction form
    21,165.30/29,201.31 = 12,207.51/x
  3. Step 3: Cross multiply
    21,165.30x = 29,201.31 × 12,207.51
  4. Step 4: Simplify right side
    21,165.30x = 356,475,283.84
  5. Step 5: Solve for x
    x = 356,475,283.84/21,165.30
  6. Step 6: Final answer
    x = 16,842.44

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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.