Home / 13,920.93-20,878.55-5,153.76

Finding the Fourth Proportional to 13,920.93, 20,878.55 and 5,153.76

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Solution

The fourth proportional to 13,920.93, 20,878.55 and 5,153.76 is: 7,729.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,920.93 : 20,878.55 = 5,153.76 : x
  2. Step 2: Convert to fraction form
    13,920.93/20,878.55 = 5,153.76/x
  3. Step 3: Cross multiply
    13,920.93x = 20,878.55 × 5,153.76
  4. Step 4: Simplify right side
    13,920.93x = 107,603,035.85
  5. Step 5: Solve for x
    x = 107,603,035.85/13,920.93
  6. Step 6: Final answer
    x = 7,729.59

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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.