Home / 21,287.92-29,378.24-11,856.48

Finding the Fourth Proportional to 21,287.92, 29,378.24 and 11,856.48

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Solution

The fourth proportional to 21,287.92, 29,378.24 and 11,856.48 is: 16,362.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,287.92 : 29,378.24 = 11,856.48 : x
  2. Step 2: Convert to fraction form
    21,287.92/29,378.24 = 11,856.48/x
  3. Step 3: Cross multiply
    21,287.92x = 29,378.24 × 11,856.48
  4. Step 4: Simplify right side
    21,287.92x = 348,322,515.00
  5. Step 5: Solve for x
    x = 348,322,515.00/21,287.92
  6. Step 6: Final answer
    x = 16,362.45

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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.