Home / 11,435.25-15,779.55-6,399.21

Finding the Fourth Proportional to 11,435.25, 15,779.55 and 6,399.21

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Solution

The fourth proportional to 11,435.25, 15,779.55 and 6,399.21 is: 8,830.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,435.25 : 15,779.55 = 6,399.21 : x
  2. Step 2: Convert to fraction form
    11,435.25/15,779.55 = 6,399.21/x
  3. Step 3: Cross multiply
    11,435.25x = 15,779.55 × 6,399.21
  4. Step 4: Simplify right side
    11,435.25x = 100,976,654.16
  5. Step 5: Solve for x
    x = 100,976,654.16/11,435.25
  6. Step 6: Final answer
    x = 8,830.30

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1.5x scale

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.