Home / 5,379.12-8,069.40-1,915.56

Finding the Fourth Proportional to 5,379.12, 8,069.40 and 1,915.56

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Solution

The fourth proportional to 5,379.12, 8,069.40 and 1,915.56 is: 2,873.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,379.12 : 8,069.40 = 1,915.56 : x
  2. Step 2: Convert to fraction form
    5,379.12/8,069.40 = 1,915.56/x
  3. Step 3: Cross multiply
    5,379.12x = 8,069.40 × 1,915.56
  4. Step 4: Simplify right side
    5,379.12x = 15,457,419.86
  5. Step 5: Solve for x
    x = 15,457,419.86/5,379.12
  6. Step 6: Final answer
    x = 2,873.60

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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.