Home / 21,322.47-29,439.54-13,787.04

Finding the Fourth Proportional to 21,322.47, 29,439.54 and 13,787.04

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Solution

The fourth proportional to 21,322.47, 29,439.54 and 13,787.04 is: 19,035.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,322.47 : 29,439.54 = 13,787.04 : x
  2. Step 2: Convert to fraction form
    21,322.47/29,439.54 = 13,787.04/x
  3. Step 3: Cross multiply
    21,322.47x = 29,439.54 × 13,787.04
  4. Step 4: Simplify right side
    21,322.47x = 405,884,115.56
  5. Step 5: Solve for x
    x = 405,884,115.56/21,322.47
  6. Step 6: Final answer
    x = 19,035.51

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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.