Home / 21,335.79-29,437.49-13,782.44

Finding the Fourth Proportional to 21,335.79, 29,437.49 and 13,782.44

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Solution

The fourth proportional to 21,335.79, 29,437.49 and 13,782.44 is: 19,015.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,335.79 : 29,437.49 = 13,782.44 : x
  2. Step 2: Convert to fraction form
    21,335.79/29,437.49 = 13,782.44/x
  3. Step 3: Cross multiply
    21,335.79x = 29,437.49 × 13,782.44
  4. Step 4: Simplify right side
    21,335.79x = 405,720,439.68
  5. Step 5: Solve for x
    x = 405,720,439.68/21,335.79
  6. Step 6: Final answer
    x = 19,015.96

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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.