Home / 13,930.35-20,878.25-6,902.79

Finding the Fourth Proportional to 13,930.35, 20,878.25 and 6,902.79

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Solution

The fourth proportional to 13,930.35, 20,878.25 and 6,902.79 is: 10,345.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,930.35 : 20,878.25 = 6,902.79 : x
  2. Step 2: Convert to fraction form
    13,930.35/20,878.25 = 6,902.79/x
  3. Step 3: Cross multiply
    13,930.35x = 20,878.25 × 6,902.79
  4. Step 4: Simplify right side
    13,930.35x = 144,118,140.80
  5. Step 5: Solve for x
    x = 144,118,140.80/13,930.35
  6. Step 6: Final answer
    x = 10,345.62

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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.