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Finding the Fourth Proportional to 21,663.20, 32,494.80 and 19,200.80

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Solution

The fourth proportional to 21,663.20, 32,494.80 and 19,200.80 is: 28,801.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,663.20 : 32,494.80 = 19,200.80 : x
  2. Step 2: Convert to fraction form
    21,663.20/32,494.80 = 19,200.80/x
  3. Step 3: Cross multiply
    21,663.20x = 32,494.80 × 19,200.80
  4. Step 4: Simplify right side
    21,663.20x = 623,926,155.84
  5. Step 5: Solve for x
    x = 623,926,155.84/21,663.20
  6. Step 6: Final answer
    x = 28,801.20

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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.