Home / 13,902.86-20,855.72-5,135.74

Finding the Fourth Proportional to 13,902.86, 20,855.72 and 5,135.74

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Solution

The fourth proportional to 13,902.86, 20,855.72 and 5,135.74 is: 7,704.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,902.86 : 20,855.72 = 5,135.74 : x
  2. Step 2: Convert to fraction form
    13,902.86/20,855.72 = 5,135.74/x
  3. Step 3: Cross multiply
    13,902.86x = 20,855.72 × 5,135.74
  4. Step 4: Simplify right side
    13,902.86x = 107,109,516.13
  5. Step 5: Solve for x
    x = 107,109,516.13/13,902.86
  6. Step 6: Final answer
    x = 7,704.13

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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.