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Finding the Fourth Proportional to 8,779.61, 13,169.12 and 3,513.21

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Solution

The fourth proportional to 8,779.61, 13,169.12 and 3,513.21 is: 5,269.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,779.61 : 13,169.12 = 3,513.21 : x
  2. Step 2: Convert to fraction form
    8,779.61/13,169.12 = 3,513.21/x
  3. Step 3: Cross multiply
    8,779.61x = 13,169.12 × 3,513.21
  4. Step 4: Simplify right side
    8,779.61x = 46,265,866.51
  5. Step 5: Solve for x
    x = 46,265,866.51/8,779.61
  6. Step 6: Final answer
    x = 5,269.70

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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.