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Finding the Fourth Proportional to 12,779.60, 17,628 and 8,996.08

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Solution

The fourth proportional to 12,779.60, 17,628 and 8,996.08 is: 12,409.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,779.60 : 17,628 = 8,996.08 : x
  2. Step 2: Convert to fraction form
    12,779.60/17,628 = 8,996.08/x
  3. Step 3: Cross multiply
    12,779.60x = 17,628 × 8,996.08
  4. Step 4: Simplify right side
    12,779.60x = 158,582,898.24
  5. Step 5: Solve for x
    x = 158,582,898.24/12,779.60
  6. Step 6: Final answer
    x = 12,409.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.