Home / 21,288.48-29,376-11,857.92

Finding the Fourth Proportional to 21,288.48, 29,376 and 11,857.92

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Solution

The fourth proportional to 21,288.48, 29,376 and 11,857.92 is: 16,362.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,288.48 : 29,376 = 11,857.92 : x
  2. Step 2: Convert to fraction form
    21,288.48/29,376 = 11,857.92/x
  3. Step 3: Cross multiply
    21,288.48x = 29,376 × 11,857.92
  4. Step 4: Simplify right side
    21,288.48x = 348,338,257.92
  5. Step 5: Solve for x
    x = 348,338,257.92/21,288.48
  6. Step 6: Final answer
    x = 16,362.76

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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.