Home / 20,913.96-31,370.76-5,119.04

Finding the Fourth Proportional to 20,913.96, 31,370.76 and 5,119.04

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Solution

The fourth proportional to 20,913.96, 31,370.76 and 5,119.04 is: 7,678.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,913.96 : 31,370.76 = 5,119.04 : x
  2. Step 2: Convert to fraction form
    20,913.96/31,370.76 = 5,119.04/x
  3. Step 3: Cross multiply
    20,913.96x = 31,370.76 × 5,119.04
  4. Step 4: Simplify right side
    20,913.96x = 160,588,175.27
  5. Step 5: Solve for x
    x = 160,588,175.27/20,913.96
  6. Step 6: Final answer
    x = 7,678.52

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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.