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Finding the Fourth Proportional to 21,361.58, 32,038.91 and 7,321.04

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Solution

The fourth proportional to 21,361.58, 32,038.91 and 7,321.04 is: 10,980.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,361.58 : 32,038.91 = 7,321.04 : x
  2. Step 2: Convert to fraction form
    21,361.58/32,038.91 = 7,321.04/x
  3. Step 3: Cross multiply
    21,361.58x = 32,038.91 × 7,321.04
  4. Step 4: Simplify right side
    21,361.58x = 234,557,981.47
  5. Step 5: Solve for x
    x = 234,557,981.47/21,361.58
  6. Step 6: Final answer
    x = 10,980.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.