Home / 7,086.96-9,779.55-3,899.61

Finding the Fourth Proportional to 7,086.96, 9,779.55 and 3,899.61

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Solution

The fourth proportional to 7,086.96, 9,779.55 and 3,899.61 is: 5,381.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,086.96 : 9,779.55 = 3,899.61 : x
  2. Step 2: Convert to fraction form
    7,086.96/9,779.55 = 3,899.61/x
  3. Step 3: Cross multiply
    7,086.96x = 9,779.55 × 3,899.61
  4. Step 4: Simplify right side
    7,086.96x = 38,136,430.98
  5. Step 5: Solve for x
    x = 38,136,430.98/7,086.96
  6. Step 6: Final answer
    x = 5,381.21

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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.