Home / 9,971.92-13,765.84-5,779.36

Finding the Fourth Proportional to 9,971.92, 13,765.84 and 5,779.36

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Solution

The fourth proportional to 9,971.92, 13,765.84 and 5,779.36 is: 7,978.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,971.92 : 13,765.84 = 5,779.36 : x
  2. Step 2: Convert to fraction form
    9,971.92/13,765.84 = 5,779.36/x
  3. Step 3: Cross multiply
    9,971.92x = 13,765.84 × 5,779.36
  4. Step 4: Simplify right side
    9,971.92x = 79,557,745.06
  5. Step 5: Solve for x
    x = 79,557,745.06/9,971.92
  6. Step 6: Final answer
    x = 7,978.18

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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.