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Finding the Fourth Proportional to 8,779.68, 13,171.64 and 2,539.51

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Solution

The fourth proportional to 8,779.68, 13,171.64 and 2,539.51 is: 3,809.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,779.68 : 13,171.64 = 2,539.51 : x
  2. Step 2: Convert to fraction form
    8,779.68/13,171.64 = 2,539.51/x
  3. Step 3: Cross multiply
    8,779.68x = 13,171.64 × 2,539.51
  4. Step 4: Simplify right side
    8,779.68x = 33,449,511.50
  5. Step 5: Solve for x
    x = 33,449,511.50/8,779.68
  6. Step 6: Final answer
    x = 3,809.88

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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.