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Finding the Fourth Proportional to 21,903.60, 32,845.80 and 8,751.60

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Solution

The fourth proportional to 21,903.60, 32,845.80 and 8,751.60 is: 13,123.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,903.60 : 32,845.80 = 8,751.60 : x
  2. Step 2: Convert to fraction form
    21,903.60/32,845.80 = 8,751.60/x
  3. Step 3: Cross multiply
    21,903.60x = 32,845.80 × 8,751.60
  4. Step 4: Simplify right side
    21,903.60x = 287,453,303.28
  5. Step 5: Solve for x
    x = 287,453,303.28/21,903.60
  6. Step 6: Final answer
    x = 13,123.56

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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.