Home / 13,876.55-20,816.19-5,109.42

Finding the Fourth Proportional to 13,876.55, 20,816.19 and 5,109.42

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Solution

The fourth proportional to 13,876.55, 20,816.19 and 5,109.42 is: 7,664.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,876.55 : 20,816.19 = 5,109.42 : x
  2. Step 2: Convert to fraction form
    13,876.55/20,816.19 = 5,109.42/x
  3. Step 3: Cross multiply
    13,876.55x = 20,816.19 × 5,109.42
  4. Step 4: Simplify right side
    13,876.55x = 106,358,657.51
  5. Step 5: Solve for x
    x = 106,358,657.51/13,876.55
  6. Step 6: Final answer
    x = 7,664.63

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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.