Home / 7,086.54-9,779.40-3,942.90

Finding the Fourth Proportional to 7,086.54, 9,779.40 and 3,942.90

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Solution

The fourth proportional to 7,086.54, 9,779.40 and 3,942.90 is: 5,441.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,086.54 : 9,779.40 = 3,942.90 : x
  2. Step 2: Convert to fraction form
    7,086.54/9,779.40 = 3,942.90/x
  3. Step 3: Cross multiply
    7,086.54x = 9,779.40 × 3,942.90
  4. Step 4: Simplify right side
    7,086.54x = 38,559,196.26
  5. Step 5: Solve for x
    x = 38,559,196.26/7,086.54
  6. Step 6: Final answer
    x = 5,441.19

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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.