Home / 21,322.80-29,439.96-13,787.36

Finding the Fourth Proportional to 21,322.80, 29,439.96 and 13,787.36

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Solution

The fourth proportional to 21,322.80, 29,439.96 and 13,787.36 is: 19,035.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,322.80 : 29,439.96 = 13,787.36 : x
  2. Step 2: Convert to fraction form
    21,322.80/29,439.96 = 13,787.36/x
  3. Step 3: Cross multiply
    21,322.80x = 29,439.96 × 13,787.36
  4. Step 4: Simplify right side
    21,322.80x = 405,899,326.91
  5. Step 5: Solve for x
    x = 405,899,326.91/21,322.80
  6. Step 6: Final answer
    x = 19,035.93

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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.