Home / 21,288.68-29,378.38-11,857.24

Finding the Fourth Proportional to 21,288.68, 29,378.38 and 11,857.24

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Solution

The fourth proportional to 21,288.68, 29,378.38 and 11,857.24 is: 16,362.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,288.68 : 29,378.38 = 11,857.24 : x
  2. Step 2: Convert to fraction form
    21,288.68/29,378.38 = 11,857.24/x
  3. Step 3: Cross multiply
    21,288.68x = 29,378.38 × 11,857.24
  4. Step 4: Simplify right side
    21,288.68x = 348,346,502.47
  5. Step 5: Solve for x
    x = 348,346,502.47/21,288.68
  6. Step 6: Final answer
    x = 16,362.99

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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.