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Finding the Fourth Proportional to 21,361.60, 32,075.30 and 18,073.04

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Solution

The fourth proportional to 21,361.60, 32,075.30 and 18,073.04 is: 27,137.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,361.60 : 32,075.30 = 18,073.04 : x
  2. Step 2: Convert to fraction form
    21,361.60/32,075.30 = 18,073.04/x
  3. Step 3: Cross multiply
    21,361.60x = 32,075.30 × 18,073.04
  4. Step 4: Simplify right side
    21,361.60x = 579,698,179.91
  5. Step 5: Solve for x
    x = 579,698,179.91/21,361.60
  6. Step 6: Final answer
    x = 27,137.40

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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.