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Finding the Fourth Proportional to 21,455.44, 32,189.88 and 9,619.14

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Solution

The fourth proportional to 21,455.44, 32,189.88 and 9,619.14 is: 14,431.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,455.44 : 32,189.88 = 9,619.14 : x
  2. Step 2: Convert to fraction form
    21,455.44/32,189.88 = 9,619.14/x
  3. Step 3: Cross multiply
    21,455.44x = 32,189.88 × 9,619.14
  4. Step 4: Simplify right side
    21,455.44x = 309,638,962.30
  5. Step 5: Solve for x
    x = 309,638,962.30/21,455.44
  6. Step 6: Final answer
    x = 14,431.72

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1.5x scale

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.