Home / 13,420.05-20,119.48-8,479.27

Finding the Fourth Proportional to 13,420.05, 20,119.48 and 8,479.27

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Solution

The fourth proportional to 13,420.05, 20,119.48 and 8,479.27 is: 12,712.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,420.05 : 20,119.48 = 8,479.27 : x
  2. Step 2: Convert to fraction form
    13,420.05/20,119.48 = 8,479.27/x
  3. Step 3: Cross multiply
    13,420.05x = 20,119.48 × 8,479.27
  4. Step 4: Simplify right side
    13,420.05x = 170,598,585.28
  5. Step 5: Solve for x
    x = 170,598,585.28/13,420.05
  6. Step 6: Final answer
    x = 12,712.22

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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.