Home / 7,920.24-11,878.40-3,535.28

Finding the Fourth Proportional to 7,920.24, 11,878.40 and 3,535.28

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Solution

The fourth proportional to 7,920.24, 11,878.40 and 3,535.28 is: 5,302.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,920.24 : 11,878.40 = 3,535.28 : x
  2. Step 2: Convert to fraction form
    7,920.24/11,878.40 = 3,535.28/x
  3. Step 3: Cross multiply
    7,920.24x = 11,878.40 × 3,535.28
  4. Step 4: Simplify right side
    7,920.24x = 41,993,469.95
  5. Step 5: Solve for x
    x = 41,993,469.95/7,920.24
  6. Step 6: Final answer
    x = 5,302.05

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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.