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Finding the Fourth Proportional to 8,779.31, 13,159.82 and 5,618.97

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Solution

The fourth proportional to 8,779.31, 13,159.82 and 5,618.97 is: 8,422.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,779.31 : 13,159.82 = 5,618.97 : x
  2. Step 2: Convert to fraction form
    8,779.31/13,159.82 = 5,618.97/x
  3. Step 3: Cross multiply
    8,779.31x = 13,159.82 × 5,618.97
  4. Step 4: Simplify right side
    8,779.31x = 73,944,605.69
  5. Step 5: Solve for x
    x = 73,944,605.69/8,779.31
  6. Step 6: Final answer
    x = 8,422.60

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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.