Home / 21,287.70-29,374.92-11,856.06

Finding the Fourth Proportional to 21,287.70, 29,374.92 and 11,856.06

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Solution

The fourth proportional to 21,287.70, 29,374.92 and 11,856.06 is: 16,360.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,287.70 : 29,374.92 = 11,856.06 : x
  2. Step 2: Convert to fraction form
    21,287.70/29,374.92 = 11,856.06/x
  3. Step 3: Cross multiply
    21,287.70x = 29,374.92 × 11,856.06
  4. Step 4: Simplify right side
    21,287.70x = 348,270,814.02
  5. Step 5: Solve for x
    x = 348,270,814.02/21,287.70
  6. Step 6: Final answer
    x = 16,360.19

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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.