Home / 21,027.12-29,022.48-12,642

Finding the Fourth Proportional to 21,027.12, 29,022.48 and 12,642

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Solution

The fourth proportional to 21,027.12, 29,022.48 and 12,642 is: 17,449.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,027.12 : 29,022.48 = 12,642 : x
  2. Step 2: Convert to fraction form
    21,027.12/29,022.48 = 12,642/x
  3. Step 3: Cross multiply
    21,027.12x = 29,022.48 × 12,642
  4. Step 4: Simplify right side
    21,027.12x = 366,902,192.16
  5. Step 5: Solve for x
    x = 366,902,192.16/21,027.12
  6. Step 6: Final answer
    x = 17,449.00

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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.