Home / 13,679.40-20,518.36-3,818.46

Finding the Fourth Proportional to 13,679.40, 20,518.36 and 3,818.46

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Solution

The fourth proportional to 13,679.40, 20,518.36 and 3,818.46 is: 5,727.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,679.40 : 20,518.36 = 3,818.46 : x
  2. Step 2: Convert to fraction form
    13,679.40/20,518.36 = 3,818.46/x
  3. Step 3: Cross multiply
    13,679.40x = 20,518.36 × 3,818.46
  4. Step 4: Simplify right side
    13,679.40x = 78,348,536.93
  5. Step 5: Solve for x
    x = 78,348,536.93/13,679.40
  6. Step 6: Final answer
    x = 5,727.48

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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.