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Finding the Fourth Proportional to 21,546.40, 32,319.60 and 19,213.60

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Solution

The fourth proportional to 21,546.40, 32,319.60 and 19,213.60 is: 28,820.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,546.40 : 32,319.60 = 19,213.60 : x
  2. Step 2: Convert to fraction form
    21,546.40/32,319.60 = 19,213.60/x
  3. Step 3: Cross multiply
    21,546.40x = 32,319.60 × 19,213.60
  4. Step 4: Simplify right side
    21,546.40x = 620,975,866.56
  5. Step 5: Solve for x
    x = 620,975,866.56/21,546.40
  6. Step 6: Final answer
    x = 28,820.40

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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.